Build and install Android apps on your phone with no computer
AppMama is an Android app that builds Android apps on the phone: you type an idea, Claude Code, Codex, Grok or OpenRouter writes the code, Gradle compiles it on the device and you install the APK.
Source
@hsyvy on X · 2026-10-20
Written in our own words. Credit to the original author. Link checked 2026-10-20.
What they did
AppMama is an Android app that builds Android apps on the phone: you type an idea, Claude Code, Codex, Grok or OpenRouter writes the code, Gradle compiles it on the device and you install the APK.
Result (as claimed)
Version 1.10 is on Google Play; no PC or cloud build needed.
Tools they used
Cost: Claude Code: from $17/mo; OpenAI Codex: free plan, paid from $8/mo; OpenRouter: free plan, paid from Pay per token.
Set it up
Write a one-page brief
Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.
Start the project with your agent
Open Claude Code and paste the brief. Ask it to propose a stack and a file plan before writing code.
Build one slice at a time
Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.
Test it like a user
Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.
Check security and ship
Keep keys in environment variables, check auth and database rules, then deploy and share the link.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Build and install Android apps on your phone with no computer What the original author did: AppMama is an Android app that builds Android apps on the phone: you type an idea, Claude Code, Codex, Grok or OpenRouter writes the code, Gradle compiles it on the device and you install the APK. Reported result (as claimed by the author): Version 1.10 is on Google Play; no PC or cloud build needed. Source: https://x.com/hsyvy/status/2112360102732923200 Tools they used: Claude Code, OpenAI Codex, Grok, OpenRouter, Android Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Build and install Android apps on your phone with no computer What the original author did: AppMama is an Android app that builds Android apps on the phone: you type an idea, Claude Code, Codex, Grok or OpenRouter writes the code, Gradle compiles it on the device and you install the APK. Reported result (as claimed by the author): Version 1.10 is on Google Play; no PC or cloud build needed. Source: https://x.com/hsyvy/status/2112360102732923200 Tools they used: Claude Code, OpenAI Codex, Grok, OpenRouter, Android Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Build and install Android apps on your phone with no computer What the original author did: AppMama is an Android app that builds Android apps on the phone: you type an idea, Claude Code, Codex, Grok or OpenRouter writes the code, Gradle compiles it on the device and you install the APK. Reported result (as claimed by the author): Version 1.10 is on Google Play; no PC or cloud build needed. Source: https://x.com/hsyvy/status/2112360102732923200 Tools they used: Claude Code, OpenAI Codex, Grok, OpenRouter, Android Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to control coding agents from your phone · How to vibe code an app with Claude Code · How to build an iPhone or Android app with AI · How to run multiple coding agents together
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