# PROTAGONIST ZURICH vs ClassSub

The clearest difference is update cadence: ClassSub at daily against PROTAGONIST ZURICH's every 4 months. PROTAGONIST ZURICH's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

PROTAGONIST ZURICH ships an update every 4 months, ClassSub daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PROTAGONIST ZURICH | ClassSub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Size | 86 MB | 8 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Spotbee, Inc.](https://appshunter.io/developer/1465231993) | [Inpulsd](https://appshunter.io/developer/1880600958) |

## What reviewers say

### PROTAGONIST ZURICH

[App page](https://appshunter.io/ios/app/protagonist-zurich/id6754158410)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### ClassSub

[App page](https://appshunter.io/ios/app/classsub/id6772268299)

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

**In-app purchases:** none


## Frequently asked questions

### Is PROTAGONIST ZURICH free?

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

### Is ClassSub free?

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

### Do PROTAGONIST ZURICH or ClassSub have ads?

Neither PROTAGONIST ZURICH nor ClassSub shows ads.

### Which is updated more often, PROTAGONIST ZURICH or ClassSub?

PROTAGONIST ZURICH ships an update every 4 months, and ClassSub daily. Most recently, PROTAGONIST ZURICH was updated on October 30, 2026 and ClassSub on October 31, 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.*