Hours Time Manager vs Simple Study Stamp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hours Time Manager
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Hours is a study motivation app optimized for the rigorous Japanese exam industry. It's more than a simple Pomodoro timer — it helps you visualize your study habits, connect with others' efforts, and stay motivated. Use the study timer to precisely record how long you spend on each subject and clearly see your study patterns. The shared timeline displays in real time how others with similar goals are studying, inspiring you without the need for chat or direct communication. Our analysis tools graph how your time is allocated across subjects and periods, guiding you in creating effective study plans based on your own progress. The interface is intuitive and beautiful so you can concentrate on studying without distractions. The supportive community encourages you to keep going at your own pace, feeling the positive energy of others rather than unhealthy comparisons. Because everyone is working hard, you can too. Build your study habits with Hours and take a step closer to your goals.
Simple Study Stamp
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Your study time is more than just a number. Keep your goals—and your current study session—visible right from your Home Screen and Lock Screen. Simple Study Stamp is a simple yet practical study time tracker with stopwatch, timer, and manual entry. With widgets, you can quickly check: • Time remaining until your goal date • Total study time • Target study time • Progress percentage And while a timer or stopwatch is running, you can check your current study status directly from the Lock Screen. Even after leaving the app, you can instantly see whether a study session is still running and how long you’ve been studying. Stay aware of your study session. Stay focused on your goal. Simple Study Stamp is designed to make consistent studying easier. See your progress at a glance Your study time is automatically organized by day, week, month, and year. Use easy-to-read bar charts and pie charts to see what you’ve studied and how much time you’ve spent on each subject. The calendar view also makes it easy to look back and see: “How much did I study that day?” “How much have I accomplished this month?” Your effort doesn’t disappear—it becomes a visible record of your progress. Track your way Choose the recording method that fits your study style: • Stopwatch • Timer • Manual entry Whether you’re studying at your desk, learning a language on your commute, reading, preparing for an exam, or working on professional development, you can record your study time in the way that works best for you. Keep your goals visible Set a target study time and goal date for each subject. Instead of simply recording study hours, Simple Study Stamp helps you stay aware of how far you’ve come and how far you still have to go. Home Screen and Lock Screen support make your goals easier to remember throughout the day. Great for • Exam preparation • Certifications • Language learning • Reading • Programming • Professional development • Self-study and lifelong learning No complicated setup. No unnecessary features getting in your way. No in-app purchases. Just open the app, start studying, and keep building your progress one session at a time. One minute today can make a big difference tomorrow. Make every minute count.
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Verdict
The clearest difference is in-app purchases: Simple Study Stamp at none against Hours Time Manager's 2. On price, update cadence, ads 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. Hours Time Manager sells 2 in-app purchases, starting at $1.99 per month. Simple Study Stamp asks for nothing beyond the download.
Hours Time Manager ships an update every 2 weeks, Simple Study Stamp every 10 days. The most recent releases landed on September 9, 2026 and September 12, 2026 respectively.
| Parameter | Hours Time Manager | Simple Study Stamp |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 192 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | QOOQ inc. | Futoshi Akahoshi |
In-app purchases
Hours Time Manager
- Monthly Subscription$1.991 Month
- プレミアム会員年間サブスクリプション(16%お得)$19.991 Year
Simple Study Stamp
No in-app purchases





