# Ratekeeper vs Transtec

The clearest difference is in-app purchases: Transtec at none against Ratekeeper's 1. Transtec also leads on iOS requirement (16.0 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Ratekeeper sells 1 one-off in-app purchase. Transtec asks for nothing beyond the download.

Ratekeeper ships an update every 3 days, Transtec every 2 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Ratekeeper | Transtec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ratekeeper-watch-accuracy/id6792385277/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 7 MB | 3 MB |
| Requires iOS | 26.5 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Slow Sunday Software LLC](https://appshunter.io/developer/6786411203) | [Konvert, LLC.](https://appshunter.io/developer/1360620900) |

## What reviewers say

### Ratekeeper

[App page](https://appshunter.io/ios/app/ratekeeper-watch-accuracy/id6792385277)

Measure the daily accuracy of your mechanical watch without specialized equipment. Simply tap when your watch's second hand aligns with true time, and the app calculates its rate. Track historical data, compare against specifications, and analyze performance by resting position.

**Highlights:** Measures watch rate in seconds per day, Historical data tracking and charting, Comparison against specified accuracy bands, Analysis of rate by resting position, Standalone true-time reference clock, Export readings to CSV

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the entire app | $4.99 | one-time |


### Transtec

[App page](https://appshunter.io/ios/app/transtec/id6793521682)

**In-app purchases:** none


## Frequently asked questions

### Is Ratekeeper free?

Ratekeeper is free to download, with in-app purchases available.

### Is Transtec free?

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

### Do Ratekeeper or Transtec have ads?

Neither Ratekeeper nor Transtec shows ads.

### Which is updated more often, Ratekeeper or Transtec?

Ratekeeper ships an update every 3 days, and Transtec every 2 days. Most recently, Ratekeeper was updated on October 7, 2026 and Transtec on October 9, 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.*