# PreservADE vs MrDocs Biometrics

The clearest difference is update cadence: MrDocs Biometrics at every 10 days against PreservADE's every 2 months. PreservADE's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.1). 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.

PreservADE ships an update every 2 months, MrDocs Biometrics every 10 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PreservADE | MrDocs Biometrics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 23 MB | 134 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ADEvantage Technology, Inc.](https://appshunter.io/developer/979694968) | [Rebecca Khambula](https://appshunter.io/developer/1612310816) |

## What reviewers say

### PreservADE

[App page](https://appshunter.io/ios/app/preservade/id1394686643)

**In-app purchases:** none


### MrDocs Biometrics

[App page](https://appshunter.io/ios/app/mrdocs-biometrics/id1666461949)

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

**In-app purchases:** none


## Frequently asked questions

### Is PreservADE free?

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

### Is MrDocs Biometrics free?

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

### Do PreservADE or MrDocs Biometrics have ads?

Neither PreservADE nor MrDocs Biometrics shows ads.

### Which is updated more often, PreservADE or MrDocs Biometrics?

PreservADE ships an update every 2 months, and MrDocs Biometrics every 10 days. Most recently, PreservADE was updated on November 2, 2026 and MrDocs Biometrics on November 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.*