# Isthera Mini vs Staff Call System by QR code

The clearest difference is in-app purchases: Isthera Mini at none against Staff Call System by QR code's 2. Isthera Mini also leads on ads (none vs shown). Staff Call System by QR code's advantage is iOS requirement (15.0 vs 17.5). On price, update cadence and device support there is nothing between them.

Both are free to download. Staff Call System by QR code sells 2 in-app purchases, starting at $17.99 per year. Isthera Mini asks for nothing beyond the download.

Isthera Mini ships an update monthly, Staff Call System by QR code every 2 months. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Isthera Mini | Staff Call System by QR code |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Size | 1 MB | 44 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Posisoft Inc](https://appshunter.io/developer/578283892) | [Leonid Shulga](https://appshunter.io/developer/1498369847) |

## What reviewers say

### Isthera Mini

[App page](https://appshunter.io/ios/app/isthera-mini/id733087132)

**Features:** macOS Compatibility

**In-app purchases:** none


### Staff Call System by QR code

[App page](https://appshunter.io/ios/app/staff-call-system-by-qr-code/id6443860336)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 year access to application | $17.99 | per year |
| Pro Access | $19.99 | one-time |


## Frequently asked questions

### Is Isthera Mini free?

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

### Is Staff Call System by QR code free?

Staff Call System by QR code is free to download, with in-app purchases available.

### Do Isthera Mini or Staff Call System by QR code have ads?

Staff Call System by QR code shows ads; Isthera Mini does not.

### Which is updated more often, Isthera Mini or Staff Call System by QR code?

Isthera Mini ships an update monthly, and Staff Call System by QR code every 2 months. Most recently, Isthera Mini was updated on September 30, 2026 and Staff Call System by QR code on October 3, 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.*