Cello Tuner vs Audio Function Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cello Tuner
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.
- Plays tuning notes for cello
- Supports C string tuning
- Supports G string tuning
- Supports D string tuning
- Supports A string tuning
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Tune your cello quickly with clear, accurate reference notes for standard tuning (C G D A).
Audio Function Generator
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.
- 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)
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This is the highly recommended and praised Function Generator App - an amazingly great and powerful tone generator. Enriched with a vast amount of features yet it is extremely intuitive and designed for simplicity. Get to know this great App now! It is very well maintained and has received considerable upgrades over the past years. So, … what can you do with this App? • PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth. • PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency). • PLAY VOLUME SWEEPS (from minimum to maximum volume). • Try the SWEEP REPEAT / WOBBLE function. • Try the MUSIC TONES PLAYBACK. • Experiment with the huge FINE TUNE SELECTON, PRESETS SELECTION! • Or create your own CUSTOM PRESETS! • And SAVE an endless amount of CONFIGURATIONS (Frequency, Sweep, Noise) for later quick access and direct playback function. • Even play back different kinds of NOISE – White, Pink, Violet, Grey, Brown, Blue is also supported. The Function Generator is AMAZINGLY INTUITIVE and SIMPLE to use! AND THESE ARE THE ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => Extending The Frequency Range (1Hz - 21kHz) => Extending The Sweep Times (0.1s - 600s) => Changing Min/Max Slider Frequency Ranges => Changing Max Sweep Time Slider Range => Changing Signal Amplitude => Enabling Of The Sweep Repeat / Wobble Function => Frequency Slider Setting to Linear or Logarithmic => Left/Right Channel Individual Selection => Permanently Saving Custom Presets => Saving Of Endless Number Of Audio Configurations => Phase Out Setting (custom phase shift of the generated signal) => BPM (Beats per Minute) Feature => Dual Function Generator => MultiTone Generator (playback of up to eight individual tones) => Background Theme Selection (Light/Dark) Check out the tutorial page: www.ee-toolkit.com/audio-function-generator
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Cello Tuner | Audio Function Generator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (252 ratings) | 4.7 (2.2K ratings) — better |
| Positive reviews | 43.8% of reviews | 77.1% of reviews — better |
| Number of ratings | 252 | 2.2K — better |
| Update frequency | Every 15 months | Every 6 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 36 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Alvin Yu | Thomas Gruber |
Customer experience
Cello Tuner
Audio Function Generator
User reviews
Cello Tuner
From 252 App Store ratingsWhat we love
- 👍 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
Room to improve
- 🔊 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
Audio Function Generator
From 2.2K App Store ratingsWhat we love
- 👍 Great app
- 🎶 Helps with Tinnitus
- 💯 Best app I've paid for
- 🔍 Highly recommended
- 🎨 Attention to detail
Room to improve
- 🐛 Crashes
- 💰 Deceptive/Money hungry
- 🔒 Basic features paywalled
- 🔒 Limited without paying
- 🔒 Removed functionality to push paid version
Bugs and requests
Cello Tuner
Reported bugs
8 issues- 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
Show 3 moreShow fewer
- Sound won't play at all
- Inaccurate pitch on certain notes (especially C string)
- Audio distortion and buzzing sounds
Requested features
8 requests- 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
Show 3 moreShow fewer
- Reduced or removed advertisements
- In-app instructions for new users
- Ability to hold notes continuously until user stops
Audio Function Generator
Reported bugs
4 issues- Crashes on launch
- Volume slider issues
- Airplay not working
- Sound distortion when display is active
Requested features
6 requests- 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
Show 1 moreShow fewer
- Improve accessibility (VoiceOver support)
In-app purchases
Cello Tuner
No in-app purchases
Audio Function Generator
- Upgrade to PRO$9.99
Questions
Is Cello Tuner free?
Is Audio Function Generator free?
Which has better reviews, Cello Tuner or Audio Function Generator?
Do Cello Tuner or Audio Function Generator have ads?
Which is updated more often, Cello Tuner or Audio Function Generator?
Other comparisons
