Yes, you can build a focus timer that grows a tree while you leave your phone alone.
You can build a timer, a growing tree and a forest of completed sessions. Start by tracking whether you leave your app, rather than trying to lock the whole phone or control other apps.
What keeps people on Forest:Everyone is already on it
The checker split your own version of Forest into its key parts and sorted each one.
Focus timer
Vibecode can build a session-length picker, countdown and start or cancel buttons.
Works out of the box
Growing virtual tree
Animate a tree through growth stages as the timer runs, and let it wither when you abandon a session.
Works out of the box
Leaving the app
Use app lifecycle events to notice when you leave, with clear rules and testing for screen locking and interruptions.
Works out of the box
Your forest
Save completed trees and session history on your device without needing an account.
Works out of the box
A native iPhone app fits focus timers, tree animations and saving your forest on your device.
Plan ahead: Test screen locking and interruptions on a real iPhone so normal phone behavior does not wrongly kill a tree.
Written by the checker for a first version. Paste it into Vibecode as is, or change it to make the app yours.
Build an iPhone app for people who want to leave their phone alone while they focus. The main screen should show a small tree, a session-length picker and a Start button. Starting a session shows a countdown and gradually grows the tree. Cancelling a session withers it after a confirmation. Track time accurately when the screen locks, and explain the rule for leaving the app before a session starts. Completed sessions add a tree to a forest screen saved on the device. Use soft greens, warm cream backgrounds and calm, original illustrations. Include realistic sample session history so I can preview the forest.
Opens Vibecode with this prompt ready. Your first build is free.
Forest offers friends already using group focus, its original tree collection, and real tree planting through Trees for the Future.
Can I vibe code Notion?Notes, docs and simple databases in one workspaceYes
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Can I vibe code Airtable?Spreadsheets that work like a database, with different viewsYes
Can I vibe code Obsidian?Linked notes saved as plain text files on your deviceYesYes, you can build a focus timer that grows a tree while you leave your phone alone. You can build a timer, a growing tree and a forest of completed sessions. Start by tracking whether you leave your app, rather than trying to lock the whole phone or control other apps.
Vibecode builds a first version from one prompt, and the checker would start with these parts: a focus timer with a tree that grows during the session; a clear abandon-session rule that withers the tree; a locally saved forest of completed sessions. Plan on an afternoon for a working first version with its real features.
Vibecode's first build is free for new accounts that sign up with Google or Apple on the web or the iPhone app, as the account's first project: one build of about 10 minutes with up to 3 features, on sample data. After that you need credits, from a paid plan or auto-reload. For your own version of Forest, the checker lists these costs: Vibecode Plus ($20 a month); Apple Developer Program ($99 a year).
Forest offers friends already using group focus, its original tree collection, and real tree planting through Trees for the Future. A version you build yourself won't have these: friends already using Forest; Forest's original tree artwork; trees for the Future partnership.
Checked October 21, 2026 with the free Can I vibe code it? checker
Forest is a trademark of its owner. Vibecode isn't affiliated with or endorsed by Forest.
Start from the checker's prompt and get a first version you can tap through. Your first build is free. Got a twist on it? Check that idea first.