Comparison

Steer vs ToolTrunk

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

Head to head
About

Steer

Transform your smartphone into a powerful OBD2 diagnostic tool. Read and clear fault codes, monitor real-time performance metrics, and test your vehicle's acceleration and emissions. Compatible with a wide range of car brands and OBD2 scanners.

Highlights
  • Universal OBD2 scanner compatibility
  • Read and erase fault codes
  • Real-time performance metrics
  • Acceleration and performance testing
  • Emission compliance checks
  • Supports various car brands
Features
Read full description

Your car has been trying to tell you something. Steer translates it. Plug the Steer sensor into the port under your steering wheel and the app reads what your car already knows โ€” then explains it the way an honest mechanic would: in plain language, with no jargon and nothing to upsell you. WHAT YOU GET: โ–  AI MECHANIC Ask anything about your car and get a straight answer. Send a photo of a warning light, a leak on the driveway or a part you don't recognize, or just describe the noise it makes. It knows your exact car and your latest scan. โ–  ONE NUMBER, 0 TO 100 Your Steer Score answers "how is my car right now?". No trouble codes to look up, no tables to read. Watch it move over time. โ–  PROBLEMS IN PLAIN LANGUAGE Every issue comes with what it means, whether it is safe to keep driving, and what the repair usually costs. Not "P0420 โ€” Catalyst System Efficiency Below Threshold". โ–  DEEP SCAN 21 systems and 126 live parameters, across every module your car will talk to. Start it, lock your phone, and get a notification when it is done. โ–  DASHBOARD LIGHT LIBRARY Every warning light on your dashboard โ€” check engine, ABS, airbag, TPMS, oil, battery โ€” what it actually means, and how urgent it really is. โ–  MAINTENANCE THAT KNOWS YOUR CAR Service intervals based on your VIN and your real mileage, not a generic checklist. Oil changes, filters, brakes, belts. โ–  SAFETY RECALLS We check your VIN against the manufacturer recall database and tell you if your car is affected. โ–  EVERY OBD2 CAR SINCE 1996 80 makes and thousands of models, 1996 to 2026. TRY IT BEFORE YOU BUY Open the app and tap "Try a real scan". You get the whole experience on a demo car โ€” scan, results, AI Mechanic โ€” with no sensor, no account and no card. WHAT YOU NEED Steer works with the Steer OBD2 sensor, available at steer.so. It is not compatible with third-party adapters. MEMBERSHIP Free forever: live codes, battery alerts and basic diagnosis. Steer Plus unlocks the unlimited AI Mechanic, full explanations for every issue, predictive maintenance and every car in the household โ€” $99/year with a 14-day free trial, or $14.99/month. Terms of Use: https://steer.so/terms Privacy Policy: https://steer.so/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ToolTrunk

Features
Read full description

ToolTrunk is a beautiful, all-local toolkit that puts six precision instruments in your pocket. Whether you're hanging a picture, checking how loud the neighbors really are, or finding true north on a hike, ToolTrunk's tools are calibrated, fast, and respect your privacy. INSIDE THE TRUNK: โ€ข Level โ€” A spirit level accurate to a tenth of a degree, with both bullseye and bar modes. Calibrate to any surface in one tap. โ€ข Compass โ€” True heading with live calibration. Cardinal markings, fine ticks, and an honest accuracy badge so you know how much to trust the reading. โ€ข Sound Meter โ€” A live decibel meter with peak, average, and a moving graph. Calibrated to common reference levels. โ€ข Flashlight โ€” Torch, SOS strobe, and a full-brightness screen lantern. One tap on, one tap off. โ€ข Ruler โ€” On-screen ruler in centimeters or inches. Calibrate once for your device, then measure anything. โ€ข Protractor โ€” Measure angles precisely with both fixed and rotating modes. DESIGNED THE RIGHT WAY: โ€ข Every measurement happens on your device. No accounts, no sign-in, no analytics. โ€ข Beautiful in light and dark mode. โ€ข iPad-ready in portrait and landscape. โ€ข No upsell, no subscriptions. Free, supported by Google ads. You can opt out of personalized ads anytime.

Screenshots

Steer4 screens
ToolTrunk4 screens

Verdict

The call

The clearest difference is in-app purchases: ToolTrunk at none against Steer's 2. ToolTrunk also leads on iOS requirement (15.0 vs 26.1). Steer's advantage is ads (none vs shown). On price 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Steer sells 2 in-app purchases, starting at $9.99 per month. ToolTrunk asks for nothing beyond the download.

Scorecard3 real differences ยท 5 level
Steer versus ToolTrunk: the parameters behind the verdict, then further details
ParameterSteerToolTrunk
PriceFreeFree
Positive reviews40.0% of reviewsโ€”
Update frequencyEvery 2 monthsโ€”
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
MonetizationFreemiumโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS26.115.0 โ€” better
Further details โ€” not scored
Size26 MB25 MB
Age rating4+4+
DeveloperSmarters EngineeredNaveen Raj

In-app purchases

2 purchases

Steer

Subscriptions2
  • OBD2 Pro$9.991 Month
  • OBD2 Pro$19.991 Year
None

ToolTrunk

No in-app purchases

Questions

Is Steer free?
Steer is free to download, with in-app purchases available.
Is ToolTrunk free?
ToolTrunk is free to download, with no in-app purchases.
Do Steer or ToolTrunk have ads?
ToolTrunk shows ads; Steer does not.

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