Comparison

TrailerWatchDog vs smart

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

Head to head

TrailerWatchDog

Free

🔧 Utilities

★ 5.02 ratingsView app →

smart-controller

About

TrailerWatchDog

Monitor critical data for your trailers, including axle temperatures, tire pressure, and tire temperatures. This app works with specific monitoring systems from Trailerwatchdog.com.

Highlights

Axle temperature monitoring
Tire pressure monitoring
Tire temperature monitoring
Works with TWD monitoring systems
Real-time data

Features

Read full description

The TrailerWatchdog application is designed to work with the TWD line of monitoring systems created by Trailerwatchdog.com. This application allows to you monitor all crucial data such as axle temperatures, tire pressure, and tire temperatures. Please visit us at TrailerWatchdog.com for more details.

About

smart

Features

Read full description

This application can be connected to the trailer module as shown in the attached video via Bluetooth. It can control the trailer module to brake, can adjust the brake parameters, can alert the user when the trailer fails, and can detect the wiring problems of the trailer harness.The trailer module does not have any safety risks and will not cause trouble to users.

Screenshots

TrailerWatchDog4 screens

smart4 screens

Verdict

The call

The clearest difference is update cadence: TrailerWatchDog at every 2 weeks against smart's monthly. smart's advantage is iOS requirement (11.0 vs 16). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TrailerWatchDog ships an update every 2 weeks, smart monthly. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 7 level

TrailerWatchDog versus smart: the parameters behind the verdict, then further details
Parameter	TrailerWatchDog	smart
Price	Free	Free
Rating	5.0 (2 ratings) — better	—
Number of ratings	2 — better	—
Update frequency	Every 2 weeks — better	Monthly
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	16	11.0 — better
Further details — not scored
Size	5 MB	18 MB
Age rating	4+	17+
Developer	TrailerWatchDog LLC	QI Automotive Co.,Ltd

In-app purchases

None

TrailerWatchDog

No in-app purchases

None

smart

No in-app purchases

Questions

Is TrailerWatchDog free?

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

Is smart free?

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

Do TrailerWatchDog or smart have ads?

Neither TrailerWatchDog nor smart shows ads.

Which is updated more often, TrailerWatchDog or smart?

TrailerWatchDog ships an update every 2 weeks, and smart monthly. Most recently, TrailerWatchDog was updated on October 4, 2026 and smart on October 7, 2026.