Vibe-code a metronome and tuner app just for your instrument practice
Learning violin, he made an iOS app just for himself that puts a metronome and tuner on one screen so he can play a scale at 60 bpm and check pitch. The tuner filters out the metronome tick.
Source
lmiller1990 on Hacker News · 2026-10-20
Written in our own words. Credit to the original author. Link checked 2026-10-23.
What they did
Learning violin, he made an iOS app just for himself that puts a metronome and tuner on one screen so he can play a scale at 60 bpm and check pitch. The tuner filters out the metronome tick.
Result (as claimed)
He says you can vibe-code your own in about an hour for a couple of dollars.
Tools they used
Cost: Pricing depends on the tools you pick; check each official pricing page.
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 AI coding agent 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: Vibe-code a metronome and tuner app just for your instrument practice What the original author did: Learning violin, he made an iOS app just for himself that puts a metronome and tuner on one screen so he can play a scale at 60 bpm and check pitch. The tuner filters out the metronome tick. Reported result (as claimed by the author): He says you can vibe-code your own in about an hour for a couple of dollars. Source: https://news.ycombinator.com/item?id=50162428 Tools they used: AI coding agent, iOS 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: Vibe-code a metronome and tuner app just for your instrument practice What the original author did: Learning violin, he made an iOS app just for himself that puts a metronome and tuner on one screen so he can play a scale at 60 bpm and check pitch. The tuner filters out the metronome tick. Reported result (as claimed by the author): He says you can vibe-code your own in about an hour for a couple of dollars. Source: https://news.ycombinator.com/item?id=50162428 Tools they used: AI coding agent, iOS 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: Vibe-code a metronome and tuner app just for your instrument practice What the original author did: Learning violin, he made an iOS app just for himself that puts a metronome and tuner on one screen so he can play a scale at 60 bpm and check pitch. The tuner filters out the metronome tick. Reported result (as claimed by the author): He says you can vibe-code your own in about an hour for a couple of dollars. Source: https://news.ycombinator.com/item?id=50162428 Tools they used: AI coding agent, iOS 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 build private apps just for yourself with AI · How to build an iPhone or Android app with AI · How to vibe code an app with Claude Code
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