Comparison

KL Serials vs Steer

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

Head to head
About

KL Serials

This utility app measures various electrical parameters like voltage, current, and power. It also offers multiple protection functions, including over-voltage, over-current, and over-temperature alerts, while monitoring battery capacity in real-time.

Highlights
  • Measures voltage, current, power, and capacity
  • Monitors watt-hours and time
  • Over-voltage protection
  • Over-current protection
  • Over-temperature protection
  • Real-time battery capacity monitoring
  • Automatic current direction identification
Features
Read full description

The KL-F series volt-ampere meter is a new type of coulomb meter that can measure various physical parameters such as voltage, current, power, charge and discharge capacity, watt-hours, and time. At the same time, it can also set parameters to achieve over-voltage protection, under-voltage protection, Multiple protection functions such as over current protection, over power protection, and over temperature protection. The meter can automatically identify the direction of the current, and can monitor the battery capacity in real time.

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/

Screenshots

KL Serials2 screens
Steer4 screens

Verdict

The call

The clearest difference is in-app purchases: KL Serials at none against Steer's 2. KL Serials also leads on iOS requirement (9.0 vs 26.1). On price, update cadence, ads 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. Steer sells 2 in-app purchases, starting at $9.99 per month. KL Serials asks for nothing beyond the download.

UpkeepUpdate frequency

KL Serials ships an update every 3 months, Steer every 2 months. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
KL Serials versus Steer: the parameters behind the verdict, then further details
ParameterKL SerialsSteer
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews—40.0% of reviews
Number of ratings2 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better26.1
Further details — not scored
Size29 MB26 MB
Age rating4+4+
DeveloperHangzhou Junce Instruments Co., Ltd.Smarters Engineered

Customer experience

KL Serials

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Steer

Written reviews10 reviews
Positive40.0%
Neutral10.0%
Negative50.0%

In-app purchases

None

KL Serials

No in-app purchases

2 purchases

Steer

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

Questions

Is KL Serials free?
KL Serials is free to download, with no in-app purchases.
Is Steer free?
Steer is free to download, with in-app purchases available.
Do KL Serials or Steer have ads?
Neither KL Serials nor Steer shows ads.
Which is updated more often, KL Serials or Steer?
KL Serials ships an update every 3 months, and Steer every 2 months. Most recently, KL Serials was updated on October 8, 2026 and Steer on October 20, 2026.

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