# Cello Tuner vs Audio Function Generator

The clearest difference is rating: Audio Function Generator at 4.7 against Cello Tuner's 3.9. Audio Function Generator also leads on ads (none vs shown) and review sentiment (77% vs 44%). Cello Tuner's advantage is in-app purchases (none vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Cello Tuner asks for nothing beyond the download.

Audio Function Generator holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 252, so its average is the more settled of the two. Written reviews point the same way: 44% of Cello Tuner's written reviews are positive against 77% of Audio Function Generator's.

Cello Tuner ships an update every 15 months, Audio Function Generator every 6 weeks. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Cello Tuner | Audio Function Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (252 ratings)](https://appshunter.io/ios/app/cello-tuner/id336370151/reviews) | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** |
| Number of ratings | 252 | **2.2K** |
| Positive reviews | 43.8% of reviews | **77.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Every 6 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 36 MB | 14 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alvin Yu](https://appshunter.io/developer/310457194) | [Thomas Gruber](https://appshunter.io/developer/342699861) |

## What reviewers say

### Cello Tuner

[App page](https://appshunter.io/ios/app/cello-tuner/id336370151)

This utility app provides accurate tuning notes for the cello, covering the standard C, G, D, and A strings. It's designed to help musicians quickly and easily achieve the correct pitch for their instrument.

**Highlights:** Plays tuning notes for cello, Supports C string tuning, Supports G string tuning, Supports D string tuning, Supports A string tuning

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy-to-use interface
- 🎵 Provides accurate reference tones for tuning
- 💰 Free app with no cost barrier
- 🚀 Fast and responsive when working
- 📱 Convenient portable alternative to physical tuners

**What reviewers complain about**

- 🔊 Poor sound quality and artificial tone
- 🎵 Doesn't sound like an actual cello
- 🐛 App frequently doesn't respond to button taps
- 📺 Excessive advertisements causing glitches
- ⏱️ Notes play for too short a duration

**Reported bugs**

- Buttons unresponsive to taps
- Screen stays blank when app is opened
- Sound glitches triggered by advertisements
- App crashes or fails to load
- Notes only play for 2 seconds

**Requested features**

- Longer note duration/sustain
- Better sound quality and more realistic cello tones
- Visual indicators showing if note is sharp or flat
- Ability to listen and analyze instrument input
- Increased volume output


### 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


## Frequently asked questions

### Is Cello Tuner free?

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

### Is Audio Function Generator free?

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

### Which has better reviews, Cello Tuner or Audio Function Generator?

Audio Function Generator is rated higher. Cello Tuner averages 3.9 out of 5 from 252 ratings, while Audio Function Generator averages 4.7 from 2.2K ratings.

### Do Cello Tuner or Audio Function Generator have ads?

Cello Tuner shows ads; Audio Function Generator does not.

### Which is updated more often, Cello Tuner or Audio Function Generator?

Cello Tuner ships an update every 15 months, and Audio Function Generator every 6 weeks. Most recently, Cello Tuner was updated on October 11, 2026 and Audio Function Generator on October 13, 2026.

---

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