# Audio Function Generator vs Strobe tachometer (RPM meter)

The clearest difference is rating: Audio Function Generator at 4.7 against Strobe tachometer (RPM meter)'s 4.3. Audio Function Generator also leads on ratings volume (2.2K vs 83) and update cadence (every 6 weeks vs every 4 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase and Strobe tachometer (RPM meter) sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Audio Function Generator holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 83, so its average is the more settled of the two. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 69% of Strobe tachometer (RPM meter)'s.

Audio Function Generator ships an update every 6 weeks, Strobe tachometer (RPM meter) every 4 months. Both last shipped on October 21, 2026.

## The numbers

| Metric | Audio Function Generator | Strobe tachometer (RPM meter) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | [4.3 (83 ratings)](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940/reviews) |
| Number of ratings | **2.2K** | 83 |
| Positive reviews | **77.2% of reviews** | 69.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 16 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) |

## What reviewers say

### Audio Function Generator

[App page](https://appshunter.io/ios/app/audio-function-generator/id768229610)

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

**Highlights:** Generate sine, square, triangle, and sawtooth tones, Frequency and volume sweep generation, Noise generation (white, pink, violet, etc.), Custom preset creation and saving, Extended frequency range (PRO feature), Multi-tone playback (PRO feature)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to PRO | $9.99 | one-time |

**What reviewers like**

- 👍 Great app
- 🎶 Helps with Tinnitus
- 💯 Best app I've paid for
- 🔍 Highly recommended
- 🎨 Attention to detail

**What reviewers complain about**

- 🐛 Crashes
- 💰 Deceptive/Money hungry
- 🔒 Basic features paywalled
- 🔒 Limited without paying
- 🔒 Removed functionality to push paid version

**Reported bugs**

- Crashes on launch
- Volume slider issues
- Airplay not working
- Sound distortion when display is active

**Requested features**

- Add download/save feature for custom sounds
- Improve sweep function (continuous mode, better frequency control)
- Add more multi-frequency rows
- Implement 432Hz base frequency option
- Add phase control for noise generators


### 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 |


## Frequently asked questions

### Is Audio Function Generator free?

Audio Function Generator is free to download, with in-app purchases available.

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

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

### Which has better reviews, Audio Function Generator or Strobe tachometer (RPM meter)?

Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Strobe tachometer (RPM meter) averages 4.3 from 83 ratings.

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

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

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

Audio Function Generator ships an update every 6 weeks, and Strobe tachometer (RPM meter) every 4 months. Most recently, Audio Function Generator was updated on October 21, 2026 and Strobe tachometer (RPM meter) on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*