Comparison

Study Timer! vs App Lock

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

Head to head
About

Study Timer!

This app helps users combat smartphone addiction and improve focus on learning. It uses timed alarms and lock modes to encourage users to put down their phones and stick to study plans. Ideal for students and parents seeking to manage screen time.

Highlights
  • Daily reminders to put down phone
  • Mandatory mode with unskippable alarms
  • Flip screen lock mode
  • Lock screen mode
  • Customizable time limits
  • Subscription for advanced features
Features
Read full description

====It's hard to concentrate, what should I do? ==== 【StudyApp】 Help you! Prevent your smartphone addiction and let you focus more on learning. When you use the phone within the set time, the phone will sound an alarm. You must return to the app and put down your phone, and then continue your focus and study plan. For people: - Students who focus on learning - Smart phone addicted students - Parents used on restrict children's use of mobile phones App features: - Daily reminder Custom settings the limit time period of the phone, remind you to put down your phone every day, focus and study. - Mandatory mode 【Mandatory mode】 A compulsory loud alarm is issued, and the time task cannot be ended early. Please note that if you select the mandatory mode, the mode cannot be released even if the app process is closed. - Lock mode: #Flip screen: Turn the phone screen over and stick it to the desktop. If you use your mobile phone within a limited time, the app will sound an alarm. This mode can prevent your attention from being disturbed by notifications from other apps on your phone. #Lock screen: Lock the phone screen. If you exit the app and use your phone within a limited time, the app will sound an alert. But you can still move your phone. Subscriptions Content • Unlock week setting • 【Force】mode • Update music regularly • Unlimited access - $0.99 per week, $11.99 per year - Subscription price varies depending on the country and your local currency - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal Privacy Policy https://shimo.im/docs/PHYqy3PRvR8yWrrp Terms of Service https://shimo.im/docs/pvkjYHjHktdyGP8V

About

App Lock

Features
Read full description

I have so much to do. And this too. But before I know it, I'm on my phone and it's already this late... Sound familiar? Videos, SNS, web surfing. Smartphones are incredibly convenient tools, but they come with tons of temptations! Is my willpower just weak? No, everyone naturally gravitates toward the easy path. That's when mechanisms (like this app) come to the rescue! This app lets anyone easily restrict smartphone apps temporarily (making them unusable), so you can focus entirely on what really matters. You can restrict specific apps, categories like SNS or games, or even all apps with ease! It also includes a To-Do list feature to manage your tasks. Follow this flow for maximum efficiency: ・Register tasks in ToDo ・Restrict distracting apps ・Complete ToDos and tap to delete them ※Tap the added checklist items to delete ・Once all ToDos are done, lift the app restrictions ・Then play as much as you want!!! <Features> ・Restrict/Release apps/websites (specific/category/all) ・To-Do list feature ※Restrictions continue even if you close this app. ※Restrictions are lifted if you delete this app while restrictions are active. Do your tasks first, then play! This is a paid app with no ads whatsoever.

Screenshots

Study Timer!2 screens
App Lock4 screens

Verdict

The call

The clearest difference is price: Study Timer! at Free against App Lock's $2.99. Study Timer! also leads on update cadence (fortnightly vs every 4 months) and iOS requirement (10.0 vs 17.0). App Lock's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Study Timer! is free to download; App Lock costs $2.99 up front. Study Timer! sells 4 in-app purchases, starting at $4.99 per 7 days. App Lock asks for nothing beyond the download.

UpkeepUpdate frequency

Study Timer! ships an update fortnightly, App Lock every 4 months. Both last shipped on October 7, 2026.

Scorecard5 real differences · 5 level
Study Timer! versus App Lock: the parameters behind the verdict, then further details
ParameterStudy Timer!App Lock
PriceFree — better$2.99
Rating4.8 (4 ratings) — better—
Positive reviews22.2% of reviews—
Number of ratings4 — better—
Update frequencyFortnightly — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better17.0
Further details — not scored
Size37 MB5 MB
Age rating4+4+
Developer云珍 朱Shun Isayama

In-app purchases

4 purchases

Study Timer!

Subscriptions4
  • Subscription a week7 Days trial$4.997 Days
  • Subscription a week (trail)3 Days trial$4.997 Days
  • Subscription a year$24.991 Year
Show 1 more
  • Subscription a year (trail)3 Days trial$24.991 Year
None

App Lock

No in-app purchases

Questions

Is Study Timer! free?
Study Timer! is free to download, with in-app purchases available.
Is App Lock free?
App Lock costs $2.99, with no in-app purchases.
Do Study Timer! or App Lock have ads?
Study Timer! shows ads; App Lock does not.
Which is updated more often, Study Timer! or App Lock?
Study Timer! ships an update fortnightly, and App Lock every 4 months. Most recently, Study Timer! was updated on October 7, 2026 and App Lock on October 7, 2026.

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