--- title: "AI App Builder with Code Review and Tests | EluxAI" url: "https://eluxai.com/services/ai-app-builder/" description: "AI app builder for developers, studios and Canadian businesses: agents plan, code, review and test web apps in your repository. Book a free assessment today." --- # AI App Builder with Code Review and Tests | EluxAI [Agents that build](/services/ "Agents that build") # An AI app builder that reviews and tests every change An AI app builder should give you software you can trust, not a demo. Our innovation is an agent engineering team that plans features, writes code in your repository, **reviews and tests every change**, and waits for a person to approve the merge. It suits studios with existing code and businesses starting fresh, all running on NVIDIA GPUs. [Book an assessment](#contact-form "Book a AI App Builder assessment")[Call (289) 800-1722](tel:+12898001722 "Call (289) 800-1722") Canadian-owned. Runs on NVIDIA GPUs. Pull request #218Checks passed Add online booking to the clinic patient portal Opened by the build agent, reviewed by the review agent, waiting on your lead developer - 214 tests passed, 18 new - Accessibility checks passed - Preview environment deployed Review agent comment, booking.ts line 88 Time slots are compared in UTC but clinics set hours in local time. Converted using the clinic's time zone so St. John's patients see correct half-hour slots. MergeRequest changes Illustration of an AI app builder pull request. Project is fictional. What it builds Web apps, progressive web apps, portals, internal tools and MVPs How changes ship Plan, code, review, test and preview on every single change Where code lives Your code repository, in the stack your team already uses Who stays in control A developer or product owner approves every merge On this page ## What is an AI app builder, and what does an agent team add? An AI app builder turns a description of what software should do into working code. Most tools on the market target people who never touch code, and the app stays on their platform. EluxAI adds an engineering process: agents plan, write, review and test real code in your repository, and a person approves every merge before it ships. No-code generators are a fast way to test an idea. The trouble starts when real customer data, payments or integrations arrive. Developers already know the gap. The [2025 Stack Overflow Developer Survey](https://survey.stackoverflow.co/2025/ai "Stack Overflow Developer Survey 2025: AI") found 66% of developers are frustrated by AI solutions that are almost right, but not quite. Our agents are not a chatbot that pastes code. Each has a role, a mission and hard limits. A planner breaks a feature into tasks, a builder writes the change, a reviewer that did not write it reads the diff, and a tester runs the checks. This is AI software development with an engineering team's habits built in. ## How does the agent team take a feature from spec to deployment? Every change follows the same loop. Agents plan the feature, write the code, review it, run tests and fix failures until the checks pass. The change is committed, packaged and deployed to a private preview environment. A developer or product owner reviews the running feature and approves the merge, and the release is recorded in the audit log. 1. **Plan.** The feature is broken into tasks tied to your spec and approved. 2. **Build.** The builder agent writes the change in your stack and conventions. 3. **Review.** A reviewer agent reads the full diff for logic, readability and risk. 4. **Test.** The build runs and automated tests must pass. 5. **Fix.** Failures go back to the builder, then through review and tests again. 6. **Preview.** The running change is deployed to a private preview environment. 7. **Approve and release.** A person approves the merge, and the release is logged. ![AI app builder feature plan splitting an online booking feature into reviewed and tested tasks with approval points](/images/services/ai-app-builder-feature-plan.webp "AI app builder feature plan with tasks, checks and approval points") ## Why does AI code review matter before anything ships? Because AI-written code is not secure by default. Veracode's 2025 testing of more than 100 language models found that 45% of AI-generated code samples introduced OWASP Top 10 vulnerabilities. Newer and larger models did not do better. A separate reviewer and automated tests catch those problems before they reach users, and a human makes the final call. The [Veracode report](https://www.veracode.com/blog/genai-code-security-report/ "Veracode 2025 GenAI Code Security Report") also found AI failed to defend against cross-site scripting in 86% of relevant samples. Trust is low for good reason. In the Stack Overflow survey, 46% of developers said they distrust the accuracy of AI output, against 33% who trust it. Google's [2025 DORA research](https://blog.google/innovation-and-ai/technology/developers-tools/dora-report-2025/ "Google 2025 DORA report") found AI adoption among software professionals reached 90%. About 30% still reported little or no trust in it. Our reviewer agent checks each change against the [OWASP Top 10:2025](https://top10.owasp.org/2025/ "OWASP Top 10:2025") risks that matter most for AI code. Those include broken access control, injection, security misconfiguration, software supply chain failures and authentication failures. Canadian team, reply within one business day Put a reviewer on every AI-written change Bring one feature from your backlog. In a free assessment we map how the agents would plan, review and test it in your codebase. [Book a free assessment](#contact-form "Book a free assessment")[Call (289) 800-1722](tel:+12898001722 "Call (289) 800-1722") ## The Two-Key Merge: how AI-written code earns its place in production The Two-Key Merge is our rule that no AI-written change reaches your main branch without two independent keys. The first is a reviewer agent that did not write the code. The second is a person on your team who approves. Seven checks sit behind those keys, so every merge has a clear, auditable reason. 1. **Spec key:** the change maps to an approved plan item. 2. **Diff review:** the reviewer agent reads the full change. 3. **Security pass:** access control, injection, configuration, dependencies and authentication are checked. 4. **Test pass:** the build succeeds and automated tests run green. 5. **Fix loop:** failures return to the builder and repeat the checks. 6. **Preview:** the running change is visible in a preview environment. 7. **Human key:** a developer or product owner approves, recorded in the audit log. What is revolutionary is not that AI writes code. It is that no AI-written change merges without two keys, and you can see who turned each one. ![AI code review comment on a pull request flagging a time zone bug before a lead developer approves the merge](/images/services/ai-code-review-pull-request.webp "AI code review on a pull request with tests passed and merge waiting") ## What can you build: web apps, PWAs and cross-platform apps? We build web apps, progressive web apps and cross-platform apps, from internal tools and customer portals to booking systems and SaaS MVPs. We do not run a dedicated native iOS and Android pipeline. For many business tools a progressive web app is enough: it installs on phones and desktops, can work offline and runs from one codebase. [MDN describes a progressive web app](https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps "Progressive web apps on MDN") as an app built with web technologies that feels like a platform-specific app. Updates ship from the web, so there is no app store review cycle for each release. Web app development suits work like tenant maintenance portals, quote calculators, client dashboards and staff scheduling tools. If your project truly needs deep native device features, we say so in the assessment rather than stretching a web app past what it does well. ## How can app developers and software studios use the agents? Studios can use the agents as extra engineering capacity inside code they already maintain. The agents read existing structure, conventions and dependencies before changing anything. Common work includes backlog features, refactors, bug fixes and missing test coverage. Senior engineers keep ownership of architecture, code review standards and client relationships, and they decide what merges. **Illustrative example.** A small software studio in Waterloo maintains a customer portal for a client and has a long feature backlog. The agents build one feature at a time. The reviewer agent catches a route missing an authorization check before commit. Tests run, the studio lead checks the preview and merges. ![Web app development test report showing passed unit, accessibility and preview checks for a customer portal release](/images/services/web-app-development-test-report.webp "Web app development test report before a reviewed release") - **Web and marketing agencies:** client portals and booking tools, paired with our [AI website builder](/services/ai-website-builder/ "AI website builder") for the public site. - **SEO agencies:** reporting dashboards and internal tools for client work. - **Property management:** installable maintenance request apps that feed a ticket desk. - **Clinics and practices:** bilingual booking and intake apps designed for privacy. - **Trades and franchises:** quote tools, crew job apps and location dashboards from one codebase. Repeatable operations beyond code, such as ticket triage, run as [custom AI agents](/services/ai-agents/ "Custom AI agents") on the same platform. ## Agent build team vs no-code AI app builder vs a development shop No-code AI app builders are the fastest way to validate an idea. A traditional development shop brings senior people and bespoke architecture at agency rates. EluxAI combines agent speed with engineering discipline: code in your repository, review and tests on every change, and a human approving each merge. The table shows where each option fits best. Three ways to build a business web app What matters No-code AI app builder Development shop EluxAI agent build team Built for Non-coders testing ideas Large, bespoke projects Developers, studios and businesses needing production code Where code lives Vendor platform Your repository Your repository, in your stack Code review Automated scans at best Senior developer review Reviewer agent plus human merge Automated tests Rarely visible Depends on the shop Part of every change Mobile Varies by platform Native or cross-platform Web apps, PWAs and cross-platform Preview and approval In the editor Staging Preview environment, approval, audit log **Verdict: no-code builders are a fast way to test an idea. Once real customer data, payments or integrations are involved, reviewed code in your own repository is the better foundation.** ## How much does web app development cost in Canada? Canadian pricing guides published in 2026 put a simple internal web tool at roughly $10,000 to $25,000 CAD. A customer portal, booking platform or dashboard typically runs $25,000 to $60,000, and a multi-user SaaS MVP $50,000 to $120,000. EluxAI quotes after a free assessment of scope, integrations and the review level your app needs. Typical market ranges for custom web apps in Canada, 2026 Project or rate Typical market range (CAD) Source Simple internal tool $10,000 to $25,000 [Databending, 2026](https://www.databending.ca/blog/how-much-does-a-custom-web-app-cost-canada-2026/ "Custom web app cost in Canada, 2026") Customer portal, booking platform or dashboard $25,000 to $60,000 Databending, 2026 Multi-user SaaS MVP $50,000 to $120,000 Databending, 2026 Custom web app or platform in Toronto $35,000 to $150,000+ [Shift8, 2026](https://shift8web.ca/pricing-web-design-in-toronto-2026-guide-for-business-owners/ "Toronto web pricing, 2026 guide") Toronto agency hourly rate $120 to $250 per hour Databending, 2026 Annual maintenance 10% to 20% of build cost Databending, 2026 These are typical market ranges from Canadian agency guides, not EluxAI prices. Looking for an app development company in Canada that shows its review process? EluxAI quotes after a free assessment. ## Which Canadian privacy and security rules apply to your app? If your app collects personal information in commercial activity, PIPEDA applies, or a substantially similar law in Alberta, British Columbia or Quebec. Quebec's Law 25 adds privacy impact assessments for technology projects involving personal information, notice of automated decisions and incident reporting. We design for these from the first sprint, though this page is general information, not legal advice. - **PIPEDA:** ten fair information principles, including consent and safeguards, as the [Privacy Commissioner outlines](https://www.priv.gc.ca/en/privacy-topics/privacy-laws-in-canada/the-personal-information-protection-and-electronic-documents-act-pipeda/pipeda_brief/ "PIPEDA in brief"). - **Quebec Law 25:** penalties reach up to $25 million or 4% of worldwide turnover, according to [BLG's compliance guide](https://www.blg.com/en/insights/2026/02/quebecs-private-sector-act-compliance-guide-for-organizations "Quebec Private Sector Act compliance guide"). - **Security testing:** higher-risk apps get [AI penetration testing](/services/ai-penetration-testing/ "AI penetration testing") on systems you own and authorize in writing. - **Sensitive specs:** internal documentation can live in a [private AI knowledge base](/services/private-ai-knowledge-base/ "Private AI knowledge base") the agents answer from. Every build is one part of our [AI for business](/services/ "AI for business services") platform. To discuss your own obligations, use our [contact page](/contact/ "Contact EluxAI"). Runs on NVIDIA GPUs ## Built on NVIDIA: private, high-throughput inference for coding agents Our agentic system runs on our own NVIDIA GPU server, and we fine-tune models on NVIDIA hardware. When a studio's code is under a non-disclosure agreement, private models on those GPUs keep proprietary source off third-party model services. Canadian hosting is available. Throughput matters as much as privacy. A planner, builder, reviewer and tester working in parallel only helps if the hardware keeps up. NVIDIA has made this a design priority: its open-source inference software batches many requests together on the same GPUs, the kind of innovation that makes multi-agent coding practical. NVIDIA describes [CUDA as the foundation for GPU computing](https://developer.nvidia.com/cuda-zone "NVIDIA CUDA platform"), and it also publishes open models built for long-running agents. We chose NVIDIA as our innovative foundation because the platform is being built for exactly this kind of agentic work. EluxAI Labs, research and development in Ontario, Canada ## How does EluxAI Labs raise the quality of AI-written code? Engineers at EluxAI R&D in Ontario designed a verification algorithm that treats every model output as a hypothesis to test. Code has to compile, pass existing and new tests and survive an independent review agent before it can be proposed for merge. When a model invents a function or skips an edge case, the loop catches it and sends the work back. What it could look like in your industry Clinical research Data capture tools have validation rules tested against the study specification. Banking Internal tools ship with audit trails and test coverage your risk team can inspect. Manufacturing Inventory and shop-floor apps are tested against real production data shapes. Marketing Campaign dashboards and integrations arrive with automated checks included. ## Questions about the AI app builder ### Can AI build an app for me? Yes, AI can build a working app, and the hard part is making it ready for real users. Our agent team turns your spec into a plan, writes the code, reviews it, runs tests and fixes failures. You see each version on a live preview link. Engineers and your team approve the work, so you end up with maintainable code rather than a demo. ### How is EluxAI different from no-code AI app builders? No-code AI builders are designed for people who never touch code, and the app usually lives on their platform. EluxAI works like an extra engineering team. Agents plan, build, review and test in a real repository, using the frameworks your developers already use. You keep the code, deploy where you want, and approve changes before they ship. ### Do you build native iOS and Android apps? We build web apps, progressive web apps and cross-platform apps rather than running a dedicated native iOS and Android pipeline. A progressive web app installs on phones and desktops, can work offline and runs from one codebase. For many business tools, that covers what staff and customers need. If your project truly requires native features, we tell you during the assessment. ### How does AI code review work? A separate reviewer agent reads every change the builder agent makes, the way a senior developer reads a pull request. It checks logic, readability and common security risks from the OWASP Top 10, then sends issues back for fixing. Tests run before anything is committed. A human approves the final merge, so no AI-written change ships without a person seeing it. ### How much does it cost to build a web app in Canada? Canadian pricing guides from 2026 put a simple internal web tool at roughly $10,000 to $25,000 CAD. A customer portal or booking platform runs $25,000 to $60,000, and a SaaS MVP $50,000 to $120,000. Annual maintenance often adds 10 to 20 percent of the build cost. We quote after a free assessment of your scope and integrations. ### Can the agents work inside our existing codebase? Yes. The agents are stack-aware, so they read your existing structure, conventions and dependencies before changing anything. Every change is reviewed and tested before it is committed, and your developers decide what merges. Studios often use this for backlog features, refactors and missing test coverage, while senior engineers keep ownership of architecture and client relationships. ### Is AI-generated code secure? Not by default. Veracode's 2025 testing found that 45 percent of AI-generated code samples introduced OWASP Top 10 vulnerabilities. That is why our pipeline includes a reviewer agent, automated tests and human approval. For higher-risk apps, we add non-destructive security testing on systems you own and authorize in writing, both before launch and after major releases. ### Where do our source code and data go when the agents work on them? You choose. Agents can use leading hosted models, or private models running on our own NVIDIA GPU server. Private inference keeps proprietary source code off third-party model services, and Canadian hosting is available. Each client works in an isolated workspace with audit logs, so nothing crosses between accounts. We cover data residency options in detail during the free assessment. ## Ship your next feature with two keys on every merge Every sprint spent checking AI output by hand is a sprint not spent shipping. Tell us about your app and we will scope a reviewed build in a free assessment. - A person on our team reviews every AI App Builder request and replies within one business day. - Your AI App Builder plan spells out the agent's tools, what it handles alone and what waits for approval. - The AI App Builder assessment is free, with no obligation. Prefer to discuss it by phone? Call [(289) 800-1722](tel:+12898001722 "Call (289) 800-1722"). Canadian team in Markham, Ontario Leave this field empty Full nameCompanyWork emailPhoneWhat should the agents handle first?Not sure yet, recommend somethingAI ReceptionistAI Business TextingAI Email AssistantAI Website BuilderAI App BuilderAI SEO AgentsAI Marketing AgentsCustom AI AgentsAI Penetration TestingPrivate AI Knowledge BaseAI Research AgentsTell us about the workI agree that EluxAI may contact me about this request. See the [privacy policy](/legal/privacy-policy/ "Privacy policy"). Request my assessment ## Agents that work alongside this one - [Agents that buildAI Website Builder](/services/ai-website-builder/ "AI Website Builder") - [Agents that run and protectAI Penetration Testing](/services/ai-penetration-testing/ "AI Penetration Testing") - [Agents that run and protectCustom AI Agents](/services/ai-agents/ "Custom AI Agents") - [Agents that run and protectPrivate AI Knowledge Base](/services/private-ai-knowledge-base/ "Private AI Knowledge Base")