Comparison

API MeasurePro vs SoundTach

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

Head to head
About

API MeasurePro

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A mobile app version of the API Metrology MeasurePro software that is able to remotely control the MeasurePro desktop software and API Metrology instruments. This app can do alignments, probe features, and inspect parts with their corresponding CAD models.

About

SoundTach

Measure engine RPM from sound without any tools. Simply point your phone at the exhaust of various engines like motorcycles, cars, or lawn mowers to get accurate, real-time readings. The app automatically filters background noise and indicates signal quality for reliable measurements.

Highlights
  • Automatic RPM detection from sound
  • Supports 2-stroke and 4-stroke engines
  • No manual configuration required
  • Real-time RPM display
  • Signal quality indicator
  • Professional and easy-to-read interface
Features
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MEASURE ENGINE RPM FROM SOUND - NO TOOLS NEEDED SoundTach is the easiest way to measure engine RPM on motorcycles, cars, lawn mowers, chainsaws, and small engines. Simply point your phone at the exhaust and see accurate RPM readings in seconds. HOW IT WORKS SoundTach uses advanced audio analysis to detect engine RPM from exhaust sound. No OBD adapter, wires, or manual calibration needed. Just: 1. Select the engine type 2. Point your phone at the exhaust 3. See real-time RPM readings The app automatically filters background noise and provides confidence indicators so you know when readings are accurate. KEY FEATURES - Automatic RPM Detection - Works with a wide variety of engines - 2-Stroke & 4-Stroke Support - Motorcycles, dirt bikes, ATVs, scooters - No Manual Configuration - Automatic gain and filtering - Real-Time RPM Display - Smooth, accurate readings - Signal Quality Indicator - Know when to move closer or back - Clean, Professional Interface - Easy to read outdoors SUPPORTED ENGINES - Motorcycles (street bikes, sport bikes, cruisers) - Dirt bikes and motocross - Scooters and mopeds - ATVs and UTVs - Lawn mowers and tractors - Chainsaws and trimmers - Generators and pumps - Go-karts and mini bikes - Small aircraft engines PERFECT FOR Motorcycle Tuning - Set idle RPM precisely without expensive equipment. Perfect for carbureted bikes like vintage motorcycles, cafe racers, and classics. Mechanic Tools - Add SoundTach to your diagnostic toolkit. Great for quick RPM checks on customer vehicles. Small Engine Repair - Tune lawn equipment, chainsaws, and generators to manufacturer specifications. DIY Maintenance - Save money by tuning your own equipment. No need to buy dedicated tachometer gauges. WHY SOUNDTACH? SoundTach works automatically. No gain adjustments, no filter configuration, no threshold tuning. Just point and measure. Our advanced signal processing handles: - Automatic gain normalization - Intelligent noise filtering - Harmonic verification - Adaptive smoothing GET STARTED FREE Try SoundTach free for 7 days with unlimited measurements. No purchase required. SUPPORT Questions? Contact us at support@soundtach.com Visit soundtach.com for tutorials and tips

Screenshots

API MeasurePro4 screens
SoundTach4 screens

Verdict

The call

The clearest difference is in-app purchases: API MeasurePro at none against SoundTach's 1. API MeasurePro also leads on iOS requirement (13.0 vs 15.0). SoundTach's advantage is update cadence (every 2 weeks vs every 3 months). On price, 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. SoundTach sells 1 one-off in-app purchase. API MeasurePro asks for nothing beyond the download.

UpkeepUpdate frequency

API MeasurePro ships an update every 3 months, SoundTach every 2 weeks. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 7 level
API MeasurePro versus SoundTach: the parameters behind the verdict, then further details
ParameterAPI MeasureProSoundTach
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size20 MB51 MB
Age rating4+4+
DeveloperAutomated Precision Inc.XCARAB INC

In-app purchases

None

API MeasurePro

No in-app purchases

1 purchases

SoundTach

One-time1
  • Full Access - Pay Once$4.99

Questions

Is API MeasurePro free?
API MeasurePro is free to download, with no in-app purchases.
Is SoundTach free?
SoundTach is free to download, with in-app purchases available.
Do API MeasurePro or SoundTach have ads?
Neither API MeasurePro nor SoundTach shows ads.
Which is updated more often, API MeasurePro or SoundTach?
API MeasurePro ships an update every 3 months, and SoundTach every 2 weeks. Most recently, API MeasurePro was updated on October 16, 2026 and SoundTach on October 10, 2026.

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