# iEvoDdc3 vs Oscillo

The clearest difference is in-app purchases: iEvoDdc3 at none against Oscillo's 5. iEvoDdc3 also leads on iOS requirement (9.3 vs 26.0). Oscillo's advantage is update cadence (weekly vs every 38 months). On price there is nothing between them.

Both are free to download. Oscillo sells 5 in-app purchases, starting at $6.99 per month. iEvoDdc3 asks for nothing beyond the download.

iEvoDdc3 ships an update every 38 months, Oscillo weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | iEvoDdc3 | Oscillo |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 38 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 10 MB | 78 MB |
| Requires iOS | **9.3** | 26.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [Fabio Elia](https://appshunter.io/developer/1449001502) | [Attila Halasz](https://appshunter.io/developer/790905891) |

## What reviewers say

### iEvoDdc3

[App page](https://appshunter.io/ios/app/ievoddc3/id1559200208)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is iEvoDdc3 free?

iEvoDdc3 is free to download, with no in-app purchases.

### Is Oscillo free?

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

### Which is updated more often, iEvoDdc3 or Oscillo?

iEvoDdc3 ships an update every 38 months, and Oscillo weekly. Most recently, iEvoDdc3 was updated on November 3, 2026 and Oscillo on November 5, 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.*