# Strobe tachometer (RPM meter) vs Primee

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

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

Strobe tachometer (RPM meter) ships an update every 4 months, Primee every 2 months. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Strobe tachometer (RPM meter) | Primee |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (83 ratings)](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940/reviews)** | — |
| Number of ratings | **83** | — |
| Positive reviews | 69.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 40 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [OUTKEY TECNOLOGIA LTDA - EPP](https://appshunter.io/developer/1111594493) |

## 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 |


### Primee

[App page](https://appshunter.io/ios/app/primee/id6443673393)

**Features:** macOS Compatibility

**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 Primee free?

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

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

Neither Strobe tachometer (RPM meter) nor Primee shows ads.

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

Strobe tachometer (RPM meter) ships an update every 4 months, and Primee every 2 months. Most recently, Strobe tachometer (RPM meter) was updated on September 9, 2026 and Primee on June 1, 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.*