# DeciMate SPL vs SoundRPM

The clearest difference is in-app purchases: DeciMate SPL at none against SoundRPM's 5. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SoundRPM sells 5 in-app purchases, starting at $3.99 per month. DeciMate SPL asks for nothing beyond the download.

## The numbers

| Metric | DeciMate SPL | SoundRPM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/soundrpm-engine-tachometer/id6787410484/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 9 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Torres](https://appshunter.io/developer/1807322882) | [春城 贾](https://appshunter.io/developer/1501061855) |

## What reviewers say

### DeciMate SPL

[App page](https://appshunter.io/ios/app/decimate-spl/id6779787723)

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

**In-app purchases:** none


### SoundRPM

[App page](https://appshunter.io/ios/app/soundrpm-engine-tachometer/id6787410484)

Estimate engine RPM using your iPhone's microphone without any extra hardware. Ideal for classic cars, motorcycles, and small engines, it provides real-time readings with confidence levels and measurement history.

**Highlights:** Estimate engine RPM from sound, Supports 2-stroke and 4-stroke engines, Choose cylinder count and RPM range, Real-time RPM display, Confidence level for readings, Save measurement history

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Member | $3.99 | per month |
| Annual Membership | $8.99 | per year |
| Annual Member | $8.99 | per year |
| Lifetime member | $5.99 | one-time |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is DeciMate SPL free?

DeciMate SPL is free to download, with no in-app purchases.

### Is SoundRPM free?

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

### Do DeciMate SPL or SoundRPM have ads?

Neither DeciMate SPL nor SoundRPM shows ads.

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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.*