# Engine RPM vs Motor Pitch Analyzer

The clearest difference is price: Motor Pitch Analyzer at Free against Engine RPM's $8.99. Motor Pitch Analyzer also leads on update cadence (monthly vs every 16 months). Engine RPM's advantage is rating (4.0 vs 1.0) and ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Motor Pitch Analyzer is free to download; Engine RPM costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Engine RPM holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Engine RPM has 35 ratings behind it against 1, so its average is the more settled of the two.

Engine RPM ships an update every 16 months, Motor Pitch Analyzer monthly. The most recent releases landed on November 10, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Engine RPM | Motor Pitch Analyzer |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[4.0 (35 ratings)](https://appshunter.io/ios/app/engine-rpm/id340401811/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028/reviews) |
| Number of ratings | **35** | 1 |
| Positive reviews | 47.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Monthly** |
| Monetization | **Free** | Ad-supported |
| Size | 3 MB | 103 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Real-Time Specialties](https://appshunter.io/developer/335568332) | [Shiho Masuda](https://appshunter.io/developer/500997902) |

## What reviewers say

### Engine RPM

[App page](https://appshunter.io/ios/app/engine-rpm/id340401811)

Analyze engine sound to calculate RPM using advanced signal processing. Ideal for engine setup and diagnostics, it supports various engine types and provides real-time feedback for accurate readings.

**Highlights:** Acoustic RPM measurement, Engine sound analysis, Supports 2-stroke/4-stroke engines, Configurable cylinder count, Real-time autocorrelation graph, Adjustable update periods, Low-pass filtering

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💰 Saves money vs. dedicated tachometer
- 🛠️ Useful for engine tuning/diagnostics
- ✅ Works well with correct settings
- 🏎️ Accurate for steady RPMs
- 💡 Ingenious app concept

**What reviewers complain about**

- 📉 Inaccurate or unreliable readings
- ❓ Difficult to configure/use
- 💸 Waste of money (for many)
- 😵 Confusing interface/settings
- ⚡ Not good for rapidly changing RPMs

**Reported bugs**

- Does not register live RPM readings
- Displays incorrect or random numbers
- App opens then closes immediately
- Blank display or flashes incorrect data intermittently
- Cannot get consistent readings

**Requested features**

- Save configuration settings
- Option to display cycle/cylinder count on home screen
- Improved response time for transient surges
- Simplified or automated setup process
- Auto-scaling graphical display for easier harmonic matching


### Motor Pitch Analyzer

[App page](https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028)

Measure small motor rotation speed in real-time using your smartphone's microphone. View motor sound waveforms for rough guidance on shaft runout and brush conditions. Achieve better accuracy by narrowing the measurement range in a quiet environment.

**Highlights:** Real-time motor RPM measurement, Motor sound waveform visualization, Adjustable measurement range for accuracy, Analysis of shaft runout and brush conditions, Quiet environment measurement recommendation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engine RPM free?

Engine RPM costs $8.99, with no in-app purchases.

### Is Motor Pitch Analyzer free?

Motor Pitch Analyzer is free to download, with no in-app purchases.

### Which has better reviews, Engine RPM or Motor Pitch Analyzer?

Engine RPM is rated higher. Engine RPM averages 4.0 out of 5 from 35 ratings, while Motor Pitch Analyzer averages 1.0 from 1 ratings.

### Do Engine RPM or Motor Pitch Analyzer have ads?

Motor Pitch Analyzer shows ads; Engine RPM does not.

### Which is updated more often, Engine RPM or Motor Pitch Analyzer?

Engine RPM ships an update every 16 months, and Motor Pitch Analyzer monthly. Most recently, Engine RPM was updated on November 10, 2026 and Motor Pitch Analyzer on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*