# Chronographer vs Oscillo

The clearest difference is rating: Oscillo at 4.8 against Chronographer's 3.0. Oscillo also leads on update cadence (weekly vs every 2 months) and ratings volume (22 vs 4). Chronographer's advantage is in-app purchases (none vs 4) and iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Oscillo sells 4 in-app purchases, starting at $6.99 per month. Chronographer asks for nothing beyond the download.

Oscillo holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Oscillo has 22 ratings behind it against 4, so its average is the more settled of the two.

Chronographer ships an update every 2 months, Oscillo weekly. The most recent releases landed on August 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Chronographer | Oscillo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/chronographer/id6448242917/reviews) | **[4.8 (22 ratings)](https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433/reviews)** |
| Number of ratings | 4 | **22** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 59 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | +4 |
| Developer | [Robert France](https://appshunter.io/developer/1684138105) | [Attila Halasz](https://appshunter.io/developer/790905891) |

## What reviewers say

### Chronographer

[App page](https://appshunter.io/ios/app/chronographer/id6448242917)

This app helps you meticulously track the accuracy of your mechanical watches. It records time differences, calculates detailed performance metrics, and visualizes trends with charts and histograms. You can also manage your watch collection, log daily wear, and analyze positional variations.

**Highlights:** Track mechanical watch accuracy, Calculate detailed performance metrics, Visualize accuracy with charts and histograms, Manage watch collection with notes and photos, Log daily watch wear, Analyze positional variation, Export watch data

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

**In-app purchases:** none


### Oscillo

[App page](https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433)

This app uses your iPhone's microphone to measure the rate, beat error, and amplitude of mechanical watches. It also identifies watch models, manages your collection with AI-generated portraits, and tracks performance over time. Get detailed reports and reminders to maintain your timepieces.

**Highlights:** Measure watch rate, beat error, and amplitude, AI watch identification and model detection, AI-generated watch portraits for collection, Collection management and organization, Detailed measurement history and trends, Precision tracking and multi-day cycles, Weekly watch reports and profile insights

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oscillo Pro Monthly | $6.99 | per month |
| Oscillo Pro Annual | $29.99 | per year |
| Founder's Lifetime | $49.99 | one-time |
| Oscillo Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Chronographer free?

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

### Is Oscillo free?

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

### Which has better reviews, Chronographer or Oscillo?

Oscillo is rated higher. Chronographer averages 3.0 out of 5 from 4 ratings, while Oscillo averages 4.8 from 22 ratings.

### Do Chronographer or Oscillo have ads?

Neither Chronographer nor Oscillo shows ads.

### Which is updated more often, Chronographer or Oscillo?

Chronographer ships an update every 2 months, and Oscillo weekly. Most recently, Chronographer was updated on August 9, 2026 and Oscillo on September 11, 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.*