Watchlog vs TRL TPMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watchlog
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Bluetooth Pressure monitoring and logging software for up to 8 connected sensors. Pressure peak capture. Export results to CSV files for further analysis. Calculation channels e.g. P1-P2. Graphical or numerical display of connected sensors.
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 Watchlog's every 3 weeks. Watchlog's advantage is iOS requirement (10.0 vs 12.2). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Watchlog ships an update every 3 weeks, TRL TPMS weekly. Both last shipped on October 25, 2026.
| Parameter | Watchlog | TRL TPMS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 12.2 |
| Further details — not scored | ||
| Size | 35 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Hydrotechnik UK Test Engineering Ltd | TRAILER RESOURCES LIMITED |
In-app purchases
Watchlog
No in-app purchases
TRL TPMS
No in-app purchases
Questions
Is Watchlog free?
Is TRL TPMS free?
Do Watchlog or TRL TPMS have ads?
Which is updated more often, Watchlog or TRL TPMS?
Other comparisons
