Lock Apps vs Grind Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lock Apps
This app helps you control and restrict the usage of other applications on your device. It offers privacy protection, time limits, and password security to prevent unauthorized access or changes.
- Privacy protection for sensitive content
- Customized app usage restrictions
- Limit app usage time
- Prevent accidental deletion or downloads
- Double password protection
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* Lock & Protect APP Privacy & Information Security * Customized Restrictions on APP USAGE * Limit APP USAGE TIME for KIDS Features - Privacy Protection: restrict the use of any application and protect sensitive private content - Usage Restrictions: prohibit the installation of illegal applications and control application usage time - Password Protection: double password protection to prevent modification - Application Control: prohibit accidental deletion of applications, prohibit application downloads, prohibit accidental application purchases Protect NOW!
Grind Timer
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GrindTimer is more than a habit tracker — it's a focus timer designed to help you turn your time into skills. Whether you're working on a side hustle, studying for a certification, or building creative output, GrindTimer makes your effort visible. Set a monthly time goal, and the app automatically calculates how much you need to do each day. Every session you clock in brings you closer to your goal — no guesswork, just real progress. AI gives you written feedback on your performance, helping you reflect and stay motivated. And with a visual calendar and ranking system, you can see how far you've come — and who's on the journey with you. Features Set monthly or daily time goals — daily targets are auto-calculated Record activity with a built-in timer using Clock In / Clock Out buttons Review your activity on a color-coded calendar Get AI-generated written feedback on your effort (Premium) Compare progress with others via the Ranking system (Premium) Manage multiple goals across categories like Study, Work, or Hobby Focus without ads (optional Premium upgrade) Final CTA Don’t just build habits — build your future. Turn your time into skills with GrindTimer. Start today. Terms of Servise : https://skillful-filament-bce.notion.site/Terms-of-Service-21057a3f131b80f893bdddd96226725d?source=copy_link #habittracker #timemanagement #sidehustle #study #ai #productivity #ranking
Screenshots
Verdict
The clearest difference is in-app purchases: Lock Apps at none against Grind Timer's 1. Grind Timer's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 months). On price and 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
Both are free to download. Grind Timer sells 1 in-app purchase, starting at $4.99 per month. Lock Apps asks for nothing beyond the download.
Lock Apps ships an update every 3 months, Grind Timer every 5 days. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.
| Parameter | Lock Apps | Grind Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (14 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | 嘉纯 赖 | Yuuki Nagata |
In-app purchases
Lock Apps
No in-app purchases
Grind Timer
- Premium Plan$4.991 Month









