# Strobe tachometer (RPM meter) vs E85 Content

The clearest difference is review sentiment: Strobe tachometer (RPM meter) at 69% against E85 Content's 0%. Strobe tachometer (RPM meter) also leads on rating (4.3 vs 3.4) and update cadence (every 4 months vs every 17 months). E85 Content's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.6). 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. E85 Content asks for nothing beyond the download.

Strobe tachometer (RPM meter) holds the better App Store score, 4.3 against 3.4. That said, the two scores are not equally well evidenced: Strobe tachometer (RPM meter) has 83 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 69% of Strobe tachometer (RPM meter)'s written reviews are positive against 0% of E85 Content's.

Strobe tachometer (RPM meter) ships an update every 4 months, E85 Content every 17 months. The most recent releases landed on September 9, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Strobe tachometer (RPM meter) | E85 Content |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (83 ratings)](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940/reviews)** | [3.4 (12 ratings)](https://appshunter.io/ios/app/e85-content/id1252861855/reviews) |
| Number of ratings | **83** | 12 |
| Positive reviews | **69.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 17 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 8 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [Delicious Tuning](https://appshunter.io/developer/1252861854) |

## 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 |


### E85 Content

[App page](https://appshunter.io/ios/app/e85-content/id1252861855)

This application displays real-time ethanol content and fuel pressure for your vehicle's fuel system. It requires a specific Bluetooth plugin kit and is compatible with a range of vehicles, with ongoing development for expansion.

**Highlights:** Real-time ethanol content display, Real-time fuel pressure display, Requires Flex Fuel Bluetooth plugin kit, Compatible with various vehicles, Ongoing development and expansion

**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 E85 Content free?

E85 Content is free to download, with no in-app purchases.

### Which has better reviews, Strobe tachometer (RPM meter) or E85 Content?

Strobe tachometer (RPM meter) is rated higher. Strobe tachometer (RPM meter) averages 4.3 out of 5 from 83 ratings, while E85 Content averages 3.4 from 12 ratings.

### Do Strobe tachometer (RPM meter) or E85 Content have ads?

Neither Strobe tachometer (RPM meter) nor E85 Content shows ads.

### Which is updated more often, Strobe tachometer (RPM meter) or E85 Content?

Strobe tachometer (RPM meter) ships an update every 4 months, and E85 Content every 17 months. Most recently, Strobe tachometer (RPM meter) was updated on September 9, 2026 and E85 Content on September 7, 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.*