# Harry's Sailor vs IODA Optimist

The clearest difference is price: IODA Optimist at Free against Harry's Sailor's $2.99. IODA Optimist also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

IODA Optimist is free to download; Harry's Sailor costs $2.99 up front. Harry's Sailor sells 1 one-off in-app purchase. IODA Optimist asks for nothing beyond the download.

Harry's Sailor ships an update every 3 months, IODA Optimist every 2 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Harry's Sailor | IODA Optimist |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/harrys-sailor/id319244049/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 41 MB | 67 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Harald Schlangmann](https://appshunter.io/developer/307688601) | [Sailti](https://appshunter.io/developer/960712124) |

## What reviewers say

### Harry's Sailor

[App page](https://appshunter.io/ios/app/harrys-sailor/id319244049)

This GPS-based navigation tool assists sailors with advanced features like heeling visualization and alarms, racing rule guidance, and full navigation support. It offers detailed nautical information and a trip recorder with Google Earth export.

**Highlights:** Heeling visualization and alarm, Racing rule #10 display, Full navigation support (polar, waypoints, course), Google Maps integration, Deviation from course and VMG display, Nautical information reference, Trip recorder with Google Earth export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Satellites Feature | $0.99 | one-time |


### IODA Optimist

[App page](https://appshunter.io/ios/app/ioda-optimist/id6504682148)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Harry's Sailor free?

Harry's Sailor costs $2.99, and also offers in-app purchases.

### Is IODA Optimist free?

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

### Do Harry's Sailor or IODA Optimist have ads?

Neither Harry's Sailor nor IODA Optimist shows ads.

### Which is updated more often, Harry's Sailor or IODA Optimist?

Harry's Sailor ships an update every 3 months, and IODA Optimist every 2 months. Most recently, Harry's Sailor was updated on October 24, 2026 and IODA Optimist on October 5, 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.*