# Odometer Data Observer vs Source CY

The clearest difference is in-app purchases: Source CY at none against Odometer Data Observer's 10. Source CY also leads on iOS requirement (16.4 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Odometer Data Observer sells 10 in-app purchases, starting at $2.99 per month. Source CY asks for nothing beyond the download.

Odometer Data Observer ships an update every 5 days, Source CY every 4 days. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Odometer Data Observer | Source CY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Size | 4 MB | 124 MB |
| Requires iOS | 26.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Sotiris Sotiriou](https://appshunter.io/developer/1885769517) | [ANDRII MELNYKOV](https://appshunter.io/developer/1889626419) |

## What reviewers say

### Odometer Data Observer

[App page](https://appshunter.io/ios/app/odometer-data-observer/id6760692984)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 ADDITIONAL CAR (Monthly) | $2.99 | per month |
| COST MANAGEMENT (Monthly) | $2.99 | per month |
| BASIC (Monthly) | $4.99 | per month |
| 2 ADDITIONAL CARS (Monthly) | $4.99 | per month |
| 3 ADDITIONAL CARS (Monthly) | $7.99 | per month |
| 1 ADDITIONAL CAR (Yearly) | $24.99 | per year |
| COST MANAGEMENT (Yearly) | $24.99 | per year |
| BASIC (Yearly) | $49.99 | per year |
| 2 ADDITIONAL CARS (Yearly) | $49.99 | per year |
| 3 ADDITIONAL CARS (Yearly) | $79.99 | per year |


### Source CY

[App page](https://appshunter.io/ios/app/source-cy/id6775313342)

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

**In-app purchases:** none


## Frequently asked questions

### Is Odometer Data Observer free?

Odometer Data Observer is free to download, with in-app purchases available.

### Is Source CY free?

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

### Do Odometer Data Observer or Source CY have ads?

Neither Odometer Data Observer nor Source CY shows ads.

### Which is updated more often, Odometer Data Observer or Source CY?

Odometer Data Observer ships an update every 5 days, and Source CY every 4 days. Most recently, Odometer Data Observer was updated on September 13, 2026 and Source CY on September 18, 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.*