# All Units vs Seafarer Documents Manager

The clearest difference is in-app purchases: All Units at none against Seafarer Documents Manager's 2. All Units also leads on update cadence (every 3 days vs fortnightly) and iOS requirement (15.0 vs 17.0). Seafarer Documents Manager's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Seafarer Documents Manager sells 2 in-app purchases, starting at $0.99 per month. All Units asks for nothing beyond the download.

All Units ships an update every 3 days, Seafarer Documents Manager fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | All Units | Seafarer Documents Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/all-units/id1663552827/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Ad-supported | — |
| Size | 7 MB | 66 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vladyslav Yarmak](https://appshunter.io/developer/1456545549) | [Mykhaylo Osypov](https://appshunter.io/developer/1875331449) |

## What reviewers say

### All Units

[App page](https://appshunter.io/ios/app/all-units/id1663552827)

This free utility app simplifies unit conversions for various measurements, saving time for technicians, students, and everyday users. It offers a wide range of conversion categories to make calculations easy and accurate.

**Highlights:** Unit conversion, Volume, Length, Mass, Temperature, Velocity, Time

**Features:** Vision Pro support

**In-app purchases:** none


### Seafarer Documents Manager

[App page](https://appshunter.io/ios/app/seafarer-documents-manager/id6758860675)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscribe | $0.99 | per month |
| Seafarer Documents Manager Premium | $11.99 | one-time |


## Frequently asked questions

### Is All Units free?

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

### Is Seafarer Documents Manager free?

Seafarer Documents Manager is free to download, with in-app purchases available.

### Do All Units or Seafarer Documents Manager have ads?

All Units shows ads; Seafarer Documents Manager does not.

### Which is updated more often, All Units or Seafarer Documents Manager?

All Units ships an update every 3 days, and Seafarer Documents Manager fortnightly. Most recently, All Units was updated on November 3, 2026 and Seafarer Documents Manager 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.*