Mastery Timer
Your path to 10,000 hours
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Mastery Timer turns the time you spend getting good at something into visible progress.
Pick the skills you want to master. Writing, reading, an instrument, a language, a sport, meditation, anything. Give each one a daily goal, and fill its bar a little more every day.
Every minute counts toward the bigger picture: the path to 10,000 hours of mastery. As your hours add up you rise through 25 ranks, from your very first session to true mastery, and the app tells you something new at every single hour. Not only at the milestones, every hour. What is shifting in your craft, what you have unlocked, how far you have come.
No points to lose. No guilt. No streaks that punish you for a missed day. Lifetime hours and ranks only ever go up. If you skip a day, a streak simply starts again, quietly. Mastery Timer is built for years of use, not for a quick hit.
Features
- Create as many skills as you want, each with its own daily goal
- A clean bar you fill each day, with a gentle gong when you reach your goal
- A lifetime mastery view: your hours, your current rank, and encouragement that changes every hour
- Tailored progress for each kind of skill, from writing to music to fitness
- Fully offline and private. Your practice stays on your device. No account, no data collected
- A calm, distraction free design
The work is the point. Mastery Timer just makes the hours add up where you can see them.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Ending a session is now easy to find. There is a clear End session button on each running skill and in the focus view, so finishing your practice is always one obvious tap. Plus small refinements under the hood.
The developer, Arjun Gupte, 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:
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contacts
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Arjun Gupte
- Size
- 57.5 MB
- Category
- Productivity
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Friends $1.99
- Copyright
- © 2026 Oxnor
