# Strobe tachometer (RPM meter) vs Function Fitter

The clearest difference is in-app purchases: Function Fitter at none against Strobe tachometer (RPM meter)'s 2. Function Fitter also leads on update cadence (every 5 weeks vs every 4 months). Strobe tachometer (RPM meter)'s advantage is iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Strobe tachometer (RPM meter) sells 2 one-off in-app purchases. Function Fitter asks for nothing beyond the download.

Strobe tachometer (RPM meter) ships an update every 4 months, Function Fitter every 5 weeks. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Strobe tachometer (RPM meter) | Function Fitter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (84 ratings)](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940/reviews)** | — |
| Number of ratings | **84** | — |
| Positive reviews | 68.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [29Apps LLC](https://appshunter.io/developer/1817021563) |

## What reviewers say

### Strobe tachometer (RPM meter)

[App page](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940)

Measure rotational speeds of objects using your phone's flashlight, laser, or magnetic sensor. Detect precise RPMs with adjustable flicker frequencies and a wide measurement range. Ideal for analyzing fan speeds, engine RPMs, and more.

**Highlights:** Strobe tachometer function, Laser tachometer mode, Magnetic tachometer mode, Adjustable flicker frequency, RPM and Hz display, High precision measurement

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version of the stroboscopic tachometer | $2.99 | one-time |
| Laser Tachometer and Magnetic | $2.99 | one-time |


### Function Fitter

[App page](https://appshunter.io/ios/app/function-fitter/id6748284369)

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

**In-app purchases:** none


## Frequently asked questions

### Is Strobe tachometer (RPM meter) free?

Strobe tachometer (RPM meter) is free to download, with in-app purchases available.

### Is Function Fitter free?

Function Fitter is free to download, with no in-app purchases.

### Do Strobe tachometer (RPM meter) or Function Fitter have ads?

Neither Strobe tachometer (RPM meter) nor Function Fitter shows ads.

### Which is updated more often, Strobe tachometer (RPM meter) or Function Fitter?

Strobe tachometer (RPM meter) ships an update every 4 months, and Function Fitter every 5 weeks. Most recently, Strobe tachometer (RPM meter) was updated on November 6, 2026 and Function Fitter on October 30, 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.*