# Observer POS vs Plan B Business

The clearest difference is iOS requirement: Plan B Business at 13.0 against Observer POS's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Observer POS ships an update every 2 months, Plan B Business monthly. The most recent releases landed on September 10, 2026 and July 1, 2026 respectively.

## The numbers

| Metric | Observer POS | Plan B Business |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 114 MB | 66 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [WHISPER INFORMATION TECHNOLOGY CO. L.L.C](https://appshunter.io/developer/1497453413) | [PLAN B Q FOR TRADING AND SERVICES](https://appshunter.io/developer/1845657715) |

## What reviewers say

### Observer POS

[App page](https://appshunter.io/ios/app/observer-pos/id1570650263)

**Features:** macOS Compatibility

**In-app purchases:** none


### Plan B Business

[App page](https://appshunter.io/ios/app/plan-b-business/id6754922401)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Observer POS free?

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

### Is Plan B Business free?

Plan B Business is free to download, with no in-app purchases.

### Do Observer POS or Plan B Business have ads?

Neither Observer POS nor Plan B Business shows ads.

### Which is updated more often, Observer POS or Plan B Business?

Observer POS ships an update every 2 months, and Plan B Business monthly. Most recently, Observer POS was updated on September 10, 2026 and Plan B Business on July 1, 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.*