# Compass Salt Water vs Calendoc

The clearest difference is in-app purchases: Compass Salt Water at none against Calendoc's 2. Compass Salt Water also leads on iOS requirement (12.0 vs 18.0). Calendoc's advantage is update cadence (weekly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Calendoc sells 2 one-off in-app purchases. Compass Salt Water asks for nothing beyond the download.

Compass Salt Water ships an update every 4 months, Calendoc weekly. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Compass Salt Water | Calendoc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 61 MB | 18 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Valley SL](https://appshunter.io/developer/1261269715) | [Toshiki Izumi](https://appshunter.io/developer/1729717097) |

## What reviewers say

### Compass Salt Water

[App page](https://appshunter.io/ios/app/compass-salt-water/id6446245705)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calendoc

[App page](https://appshunter.io/ios/app/calendoc-parallel-calendars/id6791646438)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Calendoc Pro | $19.99 | one-time |


## Frequently asked questions

### Is Compass Salt Water free?

Compass Salt Water is free to download, with no in-app purchases.

### Is Calendoc free?

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

### Do Compass Salt Water or Calendoc have ads?

Neither Compass Salt Water nor Calendoc shows ads.

### Which is updated more often, Compass Salt Water or Calendoc?

Compass Salt Water ships an update every 4 months, and Calendoc weekly. Most recently, Compass Salt Water was updated on October 18, 2026 and Calendoc on October 24, 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.*