Comparison

Flip Focus vs Mosslock

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Flip Focus

Features
Read full description

Flip your phone face down. The timer starts. Lift it, and the timer stops. Flip Focus is a deep work timer for people who are tired of promising themselves they'll concentrate. There is no honour system here and no button to press when you get distracted. The session is physically bound to your phone: face down on the desk, you are working. In your hand, you are not. WHY THIS ONE HOLDS UP Every other focus timer runs happily in your pocket while you scroll something else. This one cannot. Flip Focus reads your phone's motion sensors and only accumulates time while the phone is actually face down. You cannot quietly cheat a session, which is precisely why the hours in your history mean something. START IN ONE MOVE Choose a session and flip. That is the entire ritual. No setup to work through every time you sit down, no timer to remember to start, no excuse to open the phone "just to begin". BLOCK EVERY DISTRACTING APP While a session runs, Flip Focus uses Screen Time to put your distracting apps behind a lock screen. It works as an allowlist rather than a blocklist: everything is blocked except what you deliberately permit, so a newly installed app cannot slip through a gap you forgot to close. AUTO-PAUSE KEEPS YOU HONEST Pick the phone up mid-session and the timer pauses itself and tells you to put it back down. Your streak is not broken by the pause; it is broken by pretending the pause never happened. Flip Focus simply refuses to pretend. QUITTING TAKES A MOMENT Ending a session early is still possible, it just isn't two taps any more. You copy out a short passage that makes the case for staying, then hold a button for a few seconds. Neither step is hard, and the way out is always there when you genuinely need it. It simply stops being something you can do without thinking. Most urges to quit don't survive the minute it takes. SESSIONS THAT MATCH REAL WORK Start from ready-made blocks for deep work, quick focus, study and creative work, or build your own with the length, name and colour that suit how you actually work. Long, uninterrupted blocks for hard problems. Short ones for clearing the deck. SEE WHERE THE TIME WENT After every session, mark how it went. Your dashboard tracks total sessions, total focused time and your success rate, with your recent sessions and outcomes laid out plainly. Because the timer cannot be gamed, the trend line is the real one. BUILT TO STAY OUT OF THE WAY A Live Activity keeps the countdown on your Lock Screen so you can check the time remaining without unlocking anything. Haptics confirm the start and finish of a block. The app is quiet, quick and does not ask for your attention while you are trying to give it to something else. WHO IT IS FOR Engineers, writers, designers, founders, analysts, researchers, students โ€” anyone whose output depends on long stretches of uninterrupted attention, and whose phone is the single largest threat to getting them. If you have tried focus apps before and drifted away from them, the reason is usually the same: they asked you to be disciplined about the tool itself. Flip Focus asks for one physical action, once, at the start. The desk does the rest. Flip the phone. Do the work. Privacy Policy: https://flipfocus.cosmosmindlabs.com/privacy-policy Terms of Service: https://flipfocus.cosmosmindlabs.com/terms-of-service

About

Mosslock

Features
Read full description

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

Screenshots

Flip Focus4 screens
Mosslock4 screens

Verdict

The call

The clearest difference is update cadence: Mosslock at daily against Flip Focus's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Flip Focus sells 3 in-app purchases, starting at $3.99 per month and Mosslock sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flip Focus ships an update fortnightly, Mosslock daily. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

Scorecard1 real difference ยท 5 level
Flip Focus versus Mosslock: the parameters behind the verdict, then further details
ParameterFlip FocusMosslock
PriceFreeFree
Update frequencyFortnightlyDaily โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS16.4 โ€” better17.0
Further details โ€” not scored
Size48 MB10 MB
Age rating4+4+
DeveloperAugustine EzehJIYULMOM

In-app purchases

3 purchases

Flip Focus

Subscriptions2
  • Monthly Premium3 Days trial$3.991 Month
  • Yearly Premium3 Days trial$24.991 Year
One-time1
  • Lifetime Premium$59.99
3 purchases

Mosslock

Subscriptions2
  • Mosslock Pro Monthly$5.991 Month
  • Mosslock Pro Yearly7 Days trial$29.991 Year
One-time1
  • Mosslock Pro Lifetime$59.99

Questions

Is Flip Focus free?
Flip Focus is free to download, with in-app purchases available.
Is Mosslock free?
Mosslock is free to download, with in-app purchases available.
Do Flip Focus or Mosslock have ads?
Neither Flip Focus nor Mosslock shows ads.
Which is updated more often, Flip Focus or Mosslock?
Flip Focus ships an update fortnightly, and Mosslock daily. Most recently, Flip Focus was updated on October 19, 2026 and Mosslock on October 14, 2026.

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