StampLog vs GPSTime
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StampLog
Easily track your daily routines and habits by simply tapping a stamp on the calendar. This app helps you visualize your progress and maintain consistency in your daily activities.
- Day-to-day routine logging
- Habit continuation tracking
- Simple stamp-based operation
- Multiple sheet support for routines
- Easy progress visualization
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"StampLog" is a logger to record day-to-day routine (for instance the exercise etc) by the stamp. You can make sure of the continuation of daily exercise easily using this app. Operation is very simple. You can put the stamp by tap on the day. This is toggle action. Key Features: - Very Simple UI - Support Multiple Sheet for Routine
GPSTime
This tool converts between GPS Time and UTC, supporting various formats like GPS Week, Gregorian calendar, and Modified Julian Date. It accurately handles leap seconds and saves conversion history for GNSS professionals, researchers, and students.
- GPS Time to UTC conversion
- Support for leap seconds
- Multiple time format support
- Conversion history saving
- Configurable default scenarios
- Clean interface
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GPSTime is a time conversion tool designed for researchers, students, and GPS/GNSS professionals. Time conversion is a frequent challenge in GNSS work—whether parsing broadcast ephemerides, handling IGS product names, or aligning observation data. GPSTime streamlines this process by providing accurate conversions between GPS Time and UTC, with full support for leap seconds. The app supports a wide range of commonly used formats, including: • GPS Week + Time of Week (TOW) • GPS Week + Day of Week (DOW) • Gregorian calendar (YYYY-MM-DD HH:MM:SS) • Year + Day of Year (DOY) • Modified Julian Date (MJD) Using historical leap-second data, GPSTime ensures correct handling of the GPS–UTC offset for both past and present times. GPSTime is also capable of saving your conversion history (up to 200 logs in the History tab) and lets you configure default conversion scenarios to match your most frequently used time system and format. With a clean interface and multiple input/output options, GPSTime is an essential companion for GNSS research, education, and precise timekeeping tasks.
Screenshots
Verdict
The clearest difference is ads: GPSTime at none against StampLog's shown. GPSTime also leads on update cadence (every 2 weeks vs every 5 months) and monetization model (free vs ad-supported). StampLog's advantage is iOS requirement (15.0 vs 18.5). On price, 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.
StampLog ships an update every 5 months, GPSTime every 2 weeks. The most recent releases landed on September 26, 2026 and June 2, 2026 respectively.
| Parameter | StampLog | GPSTime |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 7 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Kouichi Abe | Gimin Kim |
Customer experience
StampLog
GPSTime
In-app purchases
StampLog
No in-app purchases
GPSTime
No in-app purchases
