# CallBell vs Muster

The clearest difference is rating: Muster at 5.0 against CallBell's 3.5. Muster also leads on ads (none vs shown) and update cadence (every 2 days vs every 21 months). CallBell's advantage is ratings volume (30 vs 2). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Muster holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: CallBell has 30 ratings behind it against 2, so its average is the more settled of the two.

CallBell ships an update every 21 months, Muster every 2 days. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | CallBell | Muster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (30 ratings)](https://appshunter.io/ios/app/callbell/id1591673276/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/muster-readiness-tracker/id6786010473/reviews)** |
| Number of ratings | **30** | 2 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 21 months | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 28 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [whitez](https://appshunter.io/developer/548591356) | [Muster Readiness LLC](https://appshunter.io/developer/6786010475) |

## What reviewers say

### CallBell

[App page](https://appshunter.io/ios/app/callbell/id1591673276)

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.

**Highlights:** Realistic call bell sound simulation, High image and sound quality, Refined 3D design, Dress-up function with themes, Augmented Reality support

**Features:** macOS Compatibility

**In-app purchases:** none


### Muster

[App page](https://appshunter.io/ios/app/muster-readiness-tracker/id6786010473)

This app helps U.S. Army Reserve soldiers track their readiness across personnel, training, and medical requirements. It provides a quick overview of what's current, due soon, or overdue, and directs users to the necessary systems for completion. Leaders can also use it to build squad readiness pictures via QR code sharing.

**Highlights:** Readiness tracking (personnel, security, training, fitness, medical), Status at a glance (current, due soon, overdue), Directs to required systems and steps, Logs completed tasks and dates, Leader mode for squad/platoon readiness, QR code status sharing, Local data storage, no account or server

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

**In-app purchases:** none


## Frequently asked questions

### Is CallBell free?

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

### Is Muster free?

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

### Which has better reviews, CallBell or Muster?

Muster is rated higher. CallBell averages 3.5 out of 5 from 30 ratings, while Muster averages 5.0 from 2 ratings.

### Do CallBell or Muster have ads?

CallBell shows ads; Muster does not.

### Which is updated more often, CallBell or Muster?

CallBell ships an update every 21 months, and Muster every 2 days. Most recently, CallBell was updated on October 14, 2026 and Muster on September 30, 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.*