CHALLENGE
Midterm Moss Challenge
Exam week: finish one locked 50-minute study session each day for 7 days and fill your garden with 7 moss patches.
Mosslock: App Blocker & Focus
Study timer, screen time limit
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Lock distracting apps while you study. Every locked minute becomes your study record and grows your moss garden. Free to start, no account.
Mosslock locks the apps that pull you away while you study, and turns every locked minute into your study record.
PICK WHAT TO PAUSE
Choose apps or whole categories once, like social media and games. Mosslock uses Apple's Screen Time features, so the apps you choose stay private, even from us.
START A SESSION
Pick a subject and a length (25, 50 or 90 minutes) and start. Paused apps show your moss instead of the feed. When the time is up, they open again on their own.
A STUDY RECORD YOU CAN TRUST
Only time your apps were really locked is counted. See today, this week and each subject at a glance.
GROW A MOSS GARDEN
Every finished session plants a patch of moss. Longer sessions grow bigger moss. Stop early and that patch withers. Keep your streak going day after day.
FREE
- Pause any apps and categories during sessions of up to 50 minutes
- Up to 3 subjects
- The last 7 days of records
- Moss garden and Home Screen widget
MOSSLOCK PRO
- Your full study history
- This month's report with a subject breakdown
- Weekly study hours that start on their own
- Strict mode for exam season
- Study sessions up to 4 hours
- Unlimited subjects
PRIVATE BY DESIGN
No account, no ads, no analytics. Your study records and the apps you choose stay on your iPhone. Purchases are processed by Apple and managed by RevenueCat with an anonymous ID.
YOU'RE ALWAYS IN CONTROL
You can stop a session in the app, and you can turn off Mosslock's Screen Time access in the Settings app at any time. Mosslock is a study tool, not medical treatment.
SUBSCRIPTION
Mosslock Pro is available as a yearly subscription with a 7-day free trial for eligible new subscribers ($29.99 per year), a monthly subscription ($5.99 per month), or a one-time Lifetime purchase ($59.99). Prices are in US dollars and may vary by country; your local price is shown in the app before you buy. Payment is charged to your Apple Account when you confirm the purchase or when the free trial ends. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel in Settings > Apple Account > Subscriptions.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://ootssu.com/mosslock/privacy.html
Events
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• New for iPhone Duo: half-fold it on your desk and the focus timer stays on top while your moss garden and Moss Buddy grow below. On the Garden tab, the other half lets you start a session.
• Stability improvements.
The developer, JIYULMOM, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- JIYULMOM
- Size
- 11 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 15 more
- English, Arabic, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Mosslock Pro Lifetime $59.99
- Mosslock Pro Monthly $5.99
- Mosslock Pro Yearly $29.99
- Copyright
- © 2026 ootssu.com
