# Oscillo vs SPL Reference

The clearest difference is iOS requirement: SPL Reference at 17.0 against Oscillo's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Oscillo sells 5 in-app purchases, starting at $6.99 per month and SPL Reference sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Oscillo ships an update weekly, SPL Reference every 2 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Oscillo | SPL Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (28 ratings)](https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433/reviews)** | — |
| Number of ratings | **28** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 78 MB | 6 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Attila Halasz](https://appshunter.io/developer/790905891) | [Direct Sound Records Ltd](https://appshunter.io/developer/1896279797) |

## What reviewers say

### Oscillo

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

Measure the accuracy of mechanical watches using your iPhone's microphone. Analyze rate, beat error, and amplitude, and organize your collection with AI-powered identification and reporting. Track performance over time and receive weekly summaries.

**Highlights:** Measure rate, beat error, and amplitude, AI watch identification, AI-generated watch portraits, Collection management, Measurement history and trends, Precision tracking, Weekly watch reports

**In-app purchases (5)**

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


### SPL Reference

[App page](https://appshunter.io/ios/app/spl-reference/id6806757498)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Professional Unlock | $39.99 | one-time |


## Frequently asked questions

### Is Oscillo free?

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

### Is SPL Reference free?

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

### Do Oscillo or SPL Reference have ads?

Neither Oscillo nor SPL Reference shows ads.

### Which is updated more often, Oscillo or SPL Reference?

Oscillo ships an update weekly, and SPL Reference every 2 weeks. Most recently, Oscillo was updated on November 9, 2026 and SPL Reference on October 31, 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.*