Cello Tuner vs CallBell
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).
CallBell
Experience realistic sound effects with this app, featuring high-quality audio and visuals. Customize your experience with a dress-up function that changes sound effects based on themes. Explore augmented reality features for an enhanced simulation.
- Realistic call bell sound simulation
- High image and sound quality
- Refined 3D design
- Dress-up function with themes
- Augmented Reality support
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Call Bell is an entertaining app that simulates the sound of a real Call Bell. Easy operation - no explanation needed! High image and sound quality with a refined design Realistic high-res image by 3D technology The best selected sound effects Check out all other effects reproduced! Dress-up function (extra) Get new themes by meeting cretain conditions! Watch the sound effect change! Get one and try it on your own. Augmented Reality
Screenshots
Verdict
The clearest difference is review sentiment: CallBell at 78% against Cello Tuner's 44%. Cello Tuner's advantage is rating (3.9 vs 3.5) and monetization model (ad-supported vs free with in-app purchases). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Cello Tuner holds the better App Store score, 3.9 against 3.5. That said, the two scores are not equally well evidenced: Cello Tuner has 252 ratings behind it against 30, so its average is the more settled of the two. Written reviews complicate that: 44% of Cello Tuner's written reviews are positive against 78% of CallBell's, so the app with the better star average is not the one people write more warmly about.
Cello Tuner ships an update every 15 months, CallBell every 21 months. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.
| Parameter | Cello Tuner | CallBell |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (252 ratings) — better | 3.5 (30 ratings) |
| Positive reviews | 43.8% of reviews | 77.8% of reviews — better |
| Number of ratings | 252 — better | 30 |
| Update frequency | Every 15 months — better | Every 21 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 36 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Alvin Yu | whitez |
Customer experience
Cello Tuner
CallBell
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
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- 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
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- Reduced or removed advertisements
- In-app instructions for new users
- Ability to hold notes continuously until user stops
CallBell
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cello Tuner
No in-app purchases
CallBell
No in-app purchases
