# StampLog vs GPSTime

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.

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.

## The numbers

| Metric | StampLog | GPSTime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gpstime/id6751814380/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 7 MB | 25 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Kouichi Abe](https://appshunter.io/developer/295852950) | [Gimin Kim](https://appshunter.io/developer/1836958729) |

## What reviewers say

### StampLog

[App page](https://appshunter.io/ios/app/stamplog/id1466944797)

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.

**Highlights:** Day-to-day routine logging, Habit continuation tracking, Simple stamp-based operation, Multiple sheet support for routines, Easy progress visualization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GPSTime

[App page](https://appshunter.io/ios/app/gpstime/id6751814380)

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.

**Highlights:** GPS Time to UTC conversion, Support for leap seconds, Multiple time format support, Conversion history saving, Configurable default scenarios, Clean interface

**In-app purchases:** none


## Frequently asked questions

### Is StampLog free?

StampLog is free to download, with no in-app purchases.

### Is GPSTime free?

GPSTime is free to download, with no in-app purchases.

### Do StampLog or GPSTime have ads?

StampLog shows ads; GPSTime does not.

### Which is updated more often, StampLog or GPSTime?

StampLog ships an update every 5 months, and GPSTime every 2 weeks. Most recently, StampLog was updated on September 26, 2026 and GPSTime on June 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*