Diagnosis vs TRL TPMS
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Diagnosis
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Diagnosis is a smart diagnostic system on demand working with iPhone or iPad. It combines vast vehicle coverage, strong diagnostic functions and many special functions. It has following features: 1. Comprehensive vehicle coverage, covers most American, Asian, European and Australian cars. 2. Full system diagnosis, with many special functions available based on users' needs. 3. Small and easily portable. 4. Bluetooth wireless connection.
TRL TPMS
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TRL's Tyre Pressure Monitoring System. To view last recorded pressure and alerts for all tyre pressures.
Screenshots
Verdict
The clearest difference is update cadence: TRL TPMS at weekly against Diagnosis's monthly. Diagnosis's advantage is iOS requirement (8.0 vs 12.2). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Diagnosis ships an update monthly, TRL TPMS weekly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | Diagnosis | TRL TPMS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Weekly โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 โ better | 12.2 |
| Further details โ not scored | ||
| Size | 550 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | ็ฟๅฎ ้ | TRAILER RESOURCES LIMITED |
In-app purchases
Diagnosis
No in-app purchases
TRL TPMS
No in-app purchases
Questions
Is Diagnosis free?
Is TRL TPMS free?
Do Diagnosis or TRL TPMS have ads?
Which is updated more often, Diagnosis or TRL TPMS?
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