UriViewer vs Simple Study Stamp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UriViewer
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This is viewer for epub3. All contents supports for education. There are many useful functions. User can view the e-Book including PDF and EPUB3. The viewer has some serviceable functions, such as bookmark, thumbnail and comment, and has the writing functions including pen and eraser.
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.
Screenshots
Verdict
The clearest difference is ads: UriViewer at none against Simple Study Stamp's shown. UriViewer also leads on iOS requirement (14.0 vs 17.0). On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
UriViewer ships an update every 2 weeks, Simple Study Stamp every 10 days. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.
| Parameter | UriViewer | Simple Study Stamp |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 63 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | kang sungheng | Futoshi Akahoshi |
In-app purchases
UriViewer
No in-app purchases
Simple Study Stamp
No in-app purchases
Questions
Is UriViewer free?
Is Simple Study Stamp free?
Do UriViewer or Simple Study Stamp have ads?
Which is updated more often, UriViewer or Simple Study Stamp?
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