# TranityLink vs OBD2 Gauges

The clearest difference is in-app purchases: TranityLink at none against OBD2 Gauges's 2. OBD2 Gauges's advantage is update cadence (every 3 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OBD2 Gauges sells 2 in-app purchases, starting at $3.99 per month. TranityLink asks for nothing beyond the download.

TranityLink ships an update every 3 months, OBD2 Gauges every 3 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | TranityLink | OBD2 Gauges |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 280 MB | 52 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [WHST HEBEI Co., Ltd.](https://appshunter.io/developer/1778653640) | [Edward Williams](https://appshunter.io/developer/1639798187) |

## What reviewers say

### TranityLink

[App page](https://appshunter.io/ios/app/tranitylink/id6757784769)

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

**In-app purchases:** none


### OBD2 Gauges

[App page](https://appshunter.io/ios/app/obd2-gauges/id6759607610)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $3.99 | per month |
| Remove Ads (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is TranityLink free?

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

### Is OBD2 Gauges free?

OBD2 Gauges is free to download, with in-app purchases available.

### Do TranityLink or OBD2 Gauges have ads?

Neither TranityLink nor OBD2 Gauges shows ads.

### Which is updated more often, TranityLink or OBD2 Gauges?

TranityLink ships an update every 3 months, and OBD2 Gauges every 3 days. Most recently, TranityLink was updated on October 7, 2026 and OBD2 Gauges on October 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.*