# RSiAJP vs Ursidae

The clearest difference is price: Ursidae at Free against RSiAJP's $22.99. Ursidae also leads on update cadence (weekly vs every 2 months). RSiAJP's advantage is device support (4 vs 2) and iOS requirement (14.0 vs 17.0). On ads and in-app purchases there is nothing between them.

Ursidae is free to download; RSiAJP costs $22.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RSiAJP ships an update every 2 months, Ursidae weekly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RSiAJP | Ursidae |
| --- | --- | --- |
| Price | $22.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rsiajp/id1234725485/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | — |
| Size | 33 MB | 60 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Grenat](https://appshunter.io/developer/1234725484) | [NatureSpy](https://appshunter.io/developer/1682232932) |

## What reviewers say

### RSiAJP

[App page](https://appshunter.io/ios/app/rsiajp/id1234725485)

Monitor and diagnose your TVR AJP engined car's ECU in real-time. View live engine data, logged faults, and GPS information. Reset faults, service intervals, and adaptives. Set custom alerts with voice and sound notifications.

**Highlights:** Real-time ECU data display, Live and logged fault monitoring, GPS speed, coordinates, and heading, ECU fault and service interval reset, Customizable alert thresholds with audio, Data logging for export, Simulated mode for demonstration

**Features:** Vision Pro support

**In-app purchases:** none


### Ursidae

[App page](https://appshunter.io/ios/app/ursidae/id6759287547)

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

**In-app purchases:** none


## Frequently asked questions

### Is RSiAJP free?

RSiAJP costs $22.99, with no in-app purchases.

### Is Ursidae free?

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

### Do RSiAJP or Ursidae have ads?

Neither RSiAJP nor Ursidae shows ads.

### Which is updated more often, RSiAJP or Ursidae?

RSiAJP ships an update every 2 months, and Ursidae weekly. Most recently, RSiAJP was updated on October 29, 2026 and Ursidae on October 25, 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.*