# Dr. Selz App vs Billfox Pay

The clearest difference is update cadence: Billfox Pay at every 5 days against Dr. Selz App's every 14 months. Dr. Selz App's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 16.0). On price, 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.

Dr. Selz App ships an update every 14 months, Billfox Pay every 5 days. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Dr. Selz App | Billfox Pay |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 days** |
| Size | 60 MB | 152 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Ulrich Selz](https://appshunter.io/developer/1652633826) | [Billfox](https://appshunter.io/developer/1701474091) |

## What reviewers say

### Dr. Selz App

[App page](https://appshunter.io/ios/app/dr-selz-app/id6444147647)

**Features:** macOS Compatibility

**In-app purchases:** none


### Billfox Pay

[App page](https://appshunter.io/ios/app/billfox-pay/id6458836788)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Selz App free?

Dr. Selz App is free to download, with no in-app purchases.

### Is Billfox Pay free?

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

### Do Dr. Selz App or Billfox Pay have ads?

Neither Dr. Selz App nor Billfox Pay shows ads.

### Which is updated more often, Dr. Selz App or Billfox Pay?

Dr. Selz App ships an update every 14 months, and Billfox Pay every 5 days. Most recently, Dr. Selz App was updated on October 4, 2026 and Billfox Pay on October 25, 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.*