Comparison

RSiAJP vs Speedtail

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RSiAJP

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
Read full description

This application enables the display and background monitoring of ECU information for TVR AJP (V8 and S6) engined cars (Cerbera, Tamora, Tuscan, Sagaris, T350). The application connects to the car's MBE 941/970 ECU using a Bluetooth Low Energy serial adapter available from http://http://rsiajp.com The app displays real time data such as water temperature, throttle position, air temperature, ignition advance, rpm, etc... as well as live and logged faults as reported by the ECU. Also, though the use of the onboard GPS, your current travelling speed is available for display. In addition to displaying the data, the application enables the user to reset the ECU's logged faults, service interval, adaptives and throttle (S6) and can be used to log live data for export via email. Warning thresholds can be setup on individual data items, the thresholds will be displayed through colour coding on the gauges. A fully simulated mode is available to show the application to your friends too, even though you're not connected to a car. More details on our website: http://rsiajp.com and our Facebook page https://www.facebook.com/rsiajp The author of the application will accept no liability whatsoever for any damage to the car, engine or ECU resulting from the use of the application. By running the application you accept full responsibility of any potential consequences.

About

Speedtail

Monitor your McLaren Speedtail's charging status remotely via your wallbox charger. This app offers insights into the performance and efficiency of one of McLaren's most advanced vehicles.

Highlights
  • Remote charging status view
  • Wallbox charger connectivity
  • McLaren Speedtail information
  • Automotive design benchmark
  • Hybrid powertrain details
Features
Read full description

Our most aerodynamically efficient car ever. And the fastest McLaren to date. With a pioneering 1070PS hybrid powertrain at its core. It brings together unprecedented levels of innovation and elegance to create a new benchmark in automotive design. Download the McLaren Speedtail app and connect to your wallbox charger to remotely view the charging status of your Speedtail.

Screenshots

RSiAJP4 screens
Speedtail4 screens

Verdict

The call

The clearest difference is price: Speedtail at Free against RSiAJP's $22.99. Speedtail also leads on update cadence (daily vs every 2 months) and iOS requirement (9.0 vs 14.0). RSiAJP's advantage is device support (4 vs 2). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for RSiAJP against 5.0 for Speedtail. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

RSiAJP ships an update every 2 months, Speedtail daily. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

Scorecard5 real differences · 5 level
RSiAJP versus Speedtail: the parameters behind the verdict, then further details
ParameterRSiAJPSpeedtail
Price$22.99Free — better
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS14.09.0 — better
Further details — not scored
Size33 MB29 MB
Age rating4+4+
DeveloperGrenatMcLaren Automotive Limited

Customer experience

RSiAJP

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Speedtail

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RSiAJP

No in-app purchases

None

Speedtail

No in-app purchases

Questions

Is RSiAJP free?
RSiAJP costs $22.99, with no in-app purchases.
Is Speedtail free?
Speedtail is free to download, with no in-app purchases.
Which has better reviews, RSiAJP or Speedtail?
RSiAJP and Speedtail are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do RSiAJP or Speedtail have ads?
Neither RSiAJP nor Speedtail shows ads.
Which is updated more often, RSiAJP or Speedtail?
RSiAJP ships an update every 2 months, and Speedtail daily. Most recently, RSiAJP was updated on October 14, 2026 and Speedtail on October 5, 2026.

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