# Engine RPM vs Torq Vault

The clearest difference is price: Torq Vault at Free against Engine RPM's $8.99. Torq Vault also leads on update cadence (every 3 months vs every 16 months). Engine RPM's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 17.0). On ads and device support there is nothing between them.

Torq Vault is free to download; Engine RPM costs $8.99 up front. Torq Vault sells 2 in-app purchases, starting at $9.99 per month. Engine RPM asks for nothing beyond the download.

Engine RPM ships an update every 16 months, Torq Vault every 3 months. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Engine RPM | Torq Vault |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[4.0 (35 ratings)](https://appshunter.io/ios/app/engine-rpm/id340401811/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 47.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 3 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Real-Time Specialties](https://appshunter.io/developer/335568332) | [Skyler Granger](https://appshunter.io/developer/1878406213) |

## 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


### Torq Vault

[App page](https://appshunter.io/ios/app/torq-vault/id6759394298)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Annual | $59.99 | per year |


## Frequently asked questions

### Is Engine RPM free?

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

### Is Torq Vault free?

Torq Vault is free to download, with in-app purchases available.

### Do Engine RPM or Torq Vault have ads?

Neither Engine RPM nor Torq Vault shows ads.

### Which is updated more often, Engine RPM or Torq Vault?

Engine RPM ships an update every 16 months, and Torq Vault every 3 months. Most recently, Engine RPM was updated on October 27, 2026 and Torq Vault on October 10, 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.*