stac Downloads & Revenuestac: Focus Timer, Build World · Google Play
Not in a tracked Google Play top chart right now.
Updated 3 Nov 2026 · rankings refresh through the day
DeveloperAX Labs.
CategoryProductivity
PriceFree
Released
Installs50k+
Rating★ 2.7 (84)
Updated
Content ratingEveryone
stac: Focus Timer, Build World update history & changes
Last change · 3 events since 27 Apr 2026Full timeline ↓Full timeline · 3 events
- 🆕stac: Focus Timer, Build World first spotted by AppInsiderUnited States (found via similar)
- 📦stac: Focus Timer, Build World version 1.0.7- Updated the Google Play Billing Library on Android.
- Improved the user interface. - 🆕stac: Focus Timer, Build World released on Google Play
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
2.7 ★
84 ratings
Measured
stac: Focus Timer, Build World on Google Play
App details
App ID
biz.aitomglobal.stac
Publisher
Ai To Mobile
Publisher country
South Korea
Content rating
Everyone
stac: Focus Timer, Build World downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in stac: Focus Timer, Build World before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How stac: Focus Timer, Build World makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 1 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Not in a Google Play top chart right now. | ||
Ratings
Google Play, worldwide.
Rating
2.7 ★
84 ratings
Measured
Ratings
84
Measured
Written reviews
4
Measured
About stac: Focus Timer, Build World
🔶 Intro
See your focus turn into visible progress.
stac is a visual focus timer that helps you stay focused and watch your world grow over time.
⏱️ Simple Focus, No Friction
Start instantly. No setup, no friction.
• Clean and minimal design
• Track study and work sessions
• Distraction-free experience
👉 A flexible focus timer for study, work, and daily habits. (Pomodoro-style supported)
🧱 Turn Time into Progress
Every 10 minutes becomes progress.
10 minutes of focus = 1 Brick
• Earn bricks and build your world
• See your effort come to life
🌍 Build Your World
Your focus creates change.
• Progress from early stages to advanced environments
• Experience visible growth as you stay consistent
• Feel your progress, not just track it
🏆 Stay Consistent
Build habits that last.
• Track your streaks
• Unlock achievements
• Grow through leagues and levels
🤝 Focus Together
You’re not alone.
• Join global progress
• Contribute alongside others
• Stay motivated through shared effort
🔒 Privacy First
• No detailed study content shared
• Minimal public data
• Safe and pressure-free environment
💡 Built for Real Life
Use it as a study timer, productivity timer, or habit tracker.
Ideal for students, professionals, and anyone who prefers a simple, distraction-free focus experience.
🚀 Get Started
Focus better.
Build your world.
Stack your time with stac.
❗Focus Guard Notice
STAC uses the Android AccessibilityService API to provide the Focus Guard feature. When a user enables Focus Guard and starts a focus session, STAC detects the currently opened app. If another app is opened during the active focus session, STAC displays a blocking screen and guides the user back to STAC to continue focusing.
STAC does not read, collect, store, or share screen content, typed text, passwords, personal messages, notifications, or any other sensitive personal data through AccessibilityService. This permission is used only to detect app switching during an active focus session and display the Focus Guard blocking screen.
See your focus turn into visible progress.
stac is a visual focus timer that helps you stay focused and watch your world grow over time.
⏱️ Simple Focus, No Friction
Start instantly. No setup, no friction.
• Clean and minimal design
• Track study and work sessions
• Distraction-free experience
👉 A flexible focus timer for study, work, and daily habits. (Pomodoro-style supported)
🧱 Turn Time into Progress
Every 10 minutes becomes progress.
10 minutes of focus = 1 Brick
• Earn bricks and build your world
• See your effort come to life
🌍 Build Your World
Your focus creates change.
• Progress from early stages to advanced environments
• Experience visible growth as you stay consistent
• Feel your progress, not just track it
🏆 Stay Consistent
Build habits that last.
• Track your streaks
• Unlock achievements
• Grow through leagues and levels
🤝 Focus Together
You’re not alone.
• Join global progress
• Contribute alongside others
• Stay motivated through shared effort
🔒 Privacy First
• No detailed study content shared
• Minimal public data
• Safe and pressure-free environment
💡 Built for Real Life
Use it as a study timer, productivity timer, or habit tracker.
Ideal for students, professionals, and anyone who prefers a simple, distraction-free focus experience.
🚀 Get Started
Focus better.
Build your world.
Stack your time with stac.
❗Focus Guard Notice
STAC uses the Android AccessibilityService API to provide the Focus Guard feature. When a user enables Focus Guard and starts a focus session, STAC detects the currently opened app. If another app is opened during the active focus session, STAC displays a blocking screen and guides the user back to STAC to continue focusing.
STAC does not read, collect, store, or share screen content, typed text, passwords, personal messages, notifications, or any other sensitive personal data through AccessibilityService. This permission is used only to detect app switching during an active focus session and display the Focus Guard blocking screen.
What's new in 1.0.7
- Updated the Google Play Billing Library on Android.
- Improved the user interface.
- Improved the user interface.