# OnTrack vs Modifiable

The clearest difference is in-app purchases: Modifiable at none against OnTrack's 2. Modifiable also leads on update cadence (every 10 days vs every 4 weeks) and iOS requirement (15.0 vs 18.6). OnTrack's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. OnTrack sells 2 in-app purchases, starting at $3.99 per month. Modifiable asks for nothing beyond the download.

OnTrack ships an update every 4 weeks, Modifiable every 10 days. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | OnTrack | Modifiable |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (54 ratings)](https://appshunter.io/ios/app/ontrack-obd2-scanner/id6446315145/reviews)** | — |
| Number of ratings | **54** | — |
| Positive reviews | 37.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 51 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [OnTrack Apps Limited](https://appshunter.io/developer/1647551624) | [Modifiable LTD](https://appshunter.io/developer/1850296361) |

## What reviewers say

### OnTrack

[App page](https://appshunter.io/ios/app/ontrack-obd2-scanner/id6446315145)

Monitor your car's real-time performance data on the racetrack with this CarPlay-enabled app. Set custom alerts for critical parameters like temperature to optimize your vehicle's performance and stay focused on the road.

**Highlights:** CarPlay integration, Real-time performance monitoring, Engine RPM, coolant temperature, oil pressure, Customizable temperature alerts, Instant notifications for threshold breaches, User-friendly display

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly - Best Value | $29.99 | per year |

**What reviewers like**

- 👍 Great CarPlay integration
- 💡 Useful for monitoring temps and info
- 🚀 Fast refresh rate
- 👍 Easy to read info at a glance
- 👍 Highly customizable

**What reviewers complain about**

- 🐛 Connection issues with various dongles
- 🐛 Lack of support/unresponsive developers
- 🐛 App crashes
- 🐛 Limited PIDs available
- 🐛 Boost pressure limit

**Reported bugs**

- Lost connections with Vgate Pro
- App crashes as soon as it connects to OBD2 reader since iOS 18
- Öltemperatur (Oil temperature) not read for VW/Audi vehicles
- Boost bar maxes at 1.5 bar / 22.3psi
- Not connecting to OBDLink CX

**Requested features**

- Add gauges instead of numbers for CarPlay
- Add more PIDs (e.g., exhaust gas temperature, transmission temp)
- Vehicle selector
- Support landscape mode
- Add custom PIDs for vehicle-specific measurements


### Modifiable

[App page](https://appshunter.io/ios/app/modifiable/id6754820863)

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

**In-app purchases:** none


## Frequently asked questions

### Is OnTrack free?

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

### Is Modifiable free?

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

### Do OnTrack or Modifiable have ads?

Modifiable shows ads; OnTrack does not.

### Which is updated more often, OnTrack or Modifiable?

OnTrack ships an update every 4 weeks, and Modifiable every 10 days. Most recently, OnTrack was updated on September 23, 2026 and Modifiable on September 9, 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.*