# Contrast vs JOS

The clearest difference is ads: JOS at none against Contrast's shown. On price, update cadence, 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.

Contrast ships an update every 2 months, JOS every 5 weeks. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Contrast | JOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 35 MB | 91 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [PumpApp Solutions AB](https://appshunter.io/developer/965303967) | [Bae Mingo](https://appshunter.io/developer/1276246647) |

## What reviewers say

### Contrast

[App page](https://appshunter.io/ios/app/contrast/id1450753354)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### JOS

[App page](https://appshunter.io/ios/app/jos/id1673087207)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Contrast free?

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

### Is JOS free?

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

### Do Contrast or JOS have ads?

Contrast shows ads; JOS does not.

### Which is updated more often, Contrast or JOS?

Contrast ships an update every 2 months, and JOS every 5 weeks. Most recently, Contrast was updated on October 7, 2026 and JOS 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.*