# Nautical Calculator. vs WatchKeeper

The clearest difference is in-app purchases: WatchKeeper at none against Nautical Calculator.'s 1. Nautical Calculator.'s advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Nautical Calculator. sells 1 one-off in-app purchase. WatchKeeper asks for nothing beyond the download.

## The numbers

| Metric | Nautical Calculator. | WatchKeeper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 43 MB | 87 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [Bad Dinosaur](https://appshunter.io/developer/1640674604) |

## What reviewers say

### Nautical Calculator.

[App page](https://appshunter.io/ios/app/nautical-calculator/id6755711720)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


### WatchKeeper

[App page](https://appshunter.io/ios/app/watchkeeper/id6757698976)

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

**In-app purchases:** none


## Frequently asked questions

### Is Nautical Calculator. free?

Nautical Calculator. is free to download, with in-app purchases available.

### Is WatchKeeper free?

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

### Do Nautical Calculator. or WatchKeeper have ads?

Neither Nautical Calculator. nor WatchKeeper shows ads.

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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.*