# ODO Check vs 3pRally

The clearest difference is in-app purchases: 3pRally at none against ODO Check's 1. ODO Check's advantage is iOS requirement (14.0 vs 16.1). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. ODO Check sells 1 one-off in-app purchase. 3pRally asks for nothing beyond the download.

ODO Check ships an update every 7 months, 3pRally every 6 months. The most recent releases landed on August 26, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | ODO Check | 3pRally |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 12 MB |
| Requires iOS | **14.0** | 16.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [Richard Silverman](https://appshunter.io/developer/297096643) | [Stooj srl](https://appshunter.io/developer/1693833265) |

## What reviewers say

### ODO Check

[App page](https://appshunter.io/ios/app/odo-check/id763078993)

Easily verify your vehicle's odometer accuracy by entering start and end readings. Get instant summaries with bargraphs and email comprehensive reports. Supports miles or kilometers and includes a speedometer.

**Highlights:** Odometer accuracy check, Instant summary with bargraphs, Email comprehensive reports, Mile or Kilometer settings, Speedometer included, Runs in background, Auto-shutdown to save power

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Time Purchase. Remove Ads | $0.99 | one-time |


### 3pRally

[App page](https://appshunter.io/ios/app/3prally-tsd-rally/id1010871673)

This navigation tool assists in TSD Regularity Rally events by providing real-time speed adjustments, time tracking, and roadbook configuration. It offers multiple display modes and customizable voice announcements to help users navigate accurately.

**Highlights:** Multiple display modes (Classic, Advanced, Roadbook), Configurable roadbook support, Real-time speed and time adjustments, Customizable voice and beep announcements, GPS calibration and accuracy selection, Track saving and export (GPX/KML), Flic button integration

**In-app purchases:** none


## Frequently asked questions

### Is ODO Check free?

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

### Is 3pRally free?

3pRally is free to download, with no in-app purchases.

### Do ODO Check or 3pRally have ads?

Neither ODO Check nor 3pRally shows ads.

### Which is updated more often, ODO Check or 3pRally?

ODO Check ships an update every 7 months, and 3pRally every 6 months. Most recently, ODO Check was updated on August 26, 2026 and 3pRally on September 14, 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.*