What For? App Blocker & Focus
Screen Time, Less Scrolling
Only for iPhone
Free · In‑App Purchases
iPhone
You came to reply, not lose the next twenty minutes to the feed.
What For? is an iPhone app blocker that helps you use distracting apps with a purpose and a stopping point. Write what you came to do, choose a time limit, then return to what matters.
A PURPOSE AND A TIME LIMIT
Reply to a message. Look up one thing. Post an update. Choose 5, 10, 15 or 30 minutes before opening a selected app. When time is up, the app is restricted again.
NO REASON TO OPEN? CHOOSE “NOT NOW”
A pause is a chance to notice an automatic habit. Leave the app closed when you do not need it, and see those choices in your records.
HOW IT WORKS
1. Allow Apple Screen Time access and select an app you want to use more intentionally.
2. Open that app. On the restriction screen, tap to write a purpose, then use the notification to open What For?. You can also open What For? yourself.
3. Write your purpose and choose your time limit. Free requires completing a rewarded ad on every unlock, including the first use. An unavailable or unfinished ad does not unlock the selected app.
4. Return to your selected app from the Home Screen. What For? does not switch apps for you.
5. The app is restricted again when your time ends. Review whether you did what you intended.
RULES THAT FIT YOUR DAY
Adjust default time, daily limits and cooldowns for each selected app. Review your purposes, skipped openings and reflections on Home and in Records.
NO ACCOUNT REQUIRED
Your written purposes, notes and selected-app identifiers stay on your device. What For? does not read messages, posts or searches inside other apps.
ADS AND ANALYTICS
The main app includes ads, including rewarded ads for Free unlocks. AdMob may process device, advertising and diagnostic data. Firebase Analytics and Crashlytics collect usage and diagnostic data; you can turn this collection off in Settings. Written purposes and notes are not sent to these services. See the privacy policy for details.
REQUIREMENTS
Requires iPhone with iOS 17 or later and Apple Screen Time permission for app restrictions. Notifications help you return to What For? and receive reminders. What For? is a personal habit tool, not a medical service.
MONTHLY MEMBERSHIPS
Custom lets you choose rewarded ads, dismissible interstitial ads, or no ads anywhere in the app. Ad duration varies; a lighter style does not guarantee a shorter ad.
Pro includes Custom and adds app-specific combinations of passwords, math, sentence copying and random codes, plus settings protection. These features do not prevent revoking OS permissions or uninstalling.
Custom and Pro are monthly auto-renewable subscriptions. Local prices appear in the purchase screen. Cancel in App Store settings at least 24 hours before renewal to avoid the next charge. Restore purchases from the plans screen. Deleting the app or its data does not cancel a subscription.
Privacy: https://nanishini.knknt.chatgpt.site/en/privacy
Terms: https://nanishini.knknt.chatgpt.site/en/terms
Apple standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added Custom and Pro monthly plans, ad-style choices, Pro app-specific unlock conditions and settings protection. Improved correct and incorrect answer feedback. Free requires completing an ad on every unlock, including the first use.
The developer, Kanta Sato, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kanta Sato
- Size
- 51.3 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- NANISHINI Custom $0.99
- NANISHINI Pro $3.99
- Copyright
- © 2026 Kanta Sato