Comparison

Steer vs 小车探Pro

Price, ratings, monetisation and update history for both apps, side by side — 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 — then explains it the way an honest mechanic would: in plain language, with no jargon and nothing to upsell you. WHAT YOU GET: ■ 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. ■ 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. ■ 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 — Catalyst System Efficiency Below Threshold". ■ 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. ■ DASHBOARD LIGHT LIBRARY Every warning light on your dashboard — check engine, ABS, airbag, TPMS, oil, battery — what it actually means, and how urgent it really is. ■ MAINTENANCE THAT KNOWS YOUR CAR Service intervals based on your VIN and your real mileage, not a generic checklist. Oil changes, filters, brakes, belts. ■ SAFETY RECALLS We check your VIN against the manufacturer recall database and tell you if your car is affected. ■ 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 — scan, results, AI Mechanic — 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 — $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

小车探Pro

Features
Read full description

小车探Pro是一款基于蓝牙通讯的智能诊断工具,它具有完整的OBDII功能、全系统诊断、AutoVIN及自动生成诊断报告等基本功能,是维修技师和技术人员的必备工具。包含13个特殊功能和超过120个汽车品牌的覆盖率。 主要特点有: 1. 全系统诊断:覆盖发动机、变速器、气囊、ABS、ESP、TPMS、转向、无线电、空调等。 2. 全OBDII功能:作为OBDII代码读取器,可执行OBDII的所有10种测试模式且终身免费。 3. 双向控制:通过主动测试轻松定位问题。 4. 13个特殊功能:执行机油复位、节气门匹配、EPB复位、BMS复位等。 5. 维修数据库:包括高频故障码维修指南、原厂技术服务公告、DLC位置、警示灯库。 6. AutoVIN: 支持自动车辆识别,实现快速诊断。 7. 无线连接:采用蓝牙5.0,最大覆盖范围为10米。 8. 图表、值和仪表板式数据展示:确保信息的易于解释。 9. 生成诊断报告:获取系统、故障代码或数据流的详细报告。

Screenshots

Steer4 screens
小车探Pro4 screens

Verdict

The call

The clearest difference is iOS requirement: 小车探Pro at 15.0 against Steer's 26.1. On price, update cadence, 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

Both are free to download. Steer sells 2 in-app purchases, starting at $9.99 per month and 小车探Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Steer ships an update every 2 months, 小车探Pro monthly. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 7 level
Steer versus 小车探Pro: the parameters behind the verdict, then further details
ParameterSteer小车探Pro
PriceFreeFree
Positive reviews26.7% of reviews—
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.115.0 — better
Further details — not scored
Size26 MB2.4 GB
Age rating4+4+
DeveloperSmarters EngineeredShenZhen Topdon Technology Co.,Ltd

In-app purchases

2 purchases

Steer

Subscriptions2
  • OBD2 Pro$9.991 Month
  • OBD2 Pro$19.991 Year
1 purchases

小车探Pro

One-time1
  • 小车探pro续费包2 variants$6.99

Questions

Is Steer free?
Steer is free to download, with in-app purchases available.
Is 小车探Pro free?
小车探Pro is free to download, with in-app purchases available.
Do Steer or 小车探Pro have ads?
Neither Steer nor 小车探Pro shows ads.
Which is updated more often, Steer or 小车探Pro?
Steer ships an update every 2 months, and 小车探Pro monthly. Most recently, Steer was updated on October 31, 2026 and 小车探Pro on October 25, 2026.

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