# Beat Length Calculator vs IODA Optimist

The clearest difference is iOS requirement: IODA Optimist at 11.0 against Beat Length Calculator's 15.0. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 12, 2026 and December 14, 2025 respectively.

## The numbers

| Metric | Beat Length Calculator | IODA Optimist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/beat-length-calculator/id1635014077/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 85 MB | 67 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egor Leonenko](https://appshunter.io/developer/1492557180) | [Agencia Interactiva Balear S.L.](https://appshunter.io/developer/960712124) |

## What reviewers say

### Beat Length Calculator

[App page](https://appshunter.io/ios/app/beat-length-calculator/id1635014077)

Calculate beat lengths for dinghy classes quickly and easily. This tool uses course layout, wind speed, and target time for accurate results. It's based on data from sailing experts and other reliable sources.

**Highlights:** Dinghy class beat length calculation, Course layout input, Wind speed integration, Target time setting, Data-driven accuracy

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

**In-app purchases:** none


### IODA Optimist

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Beat Length Calculator free?

Beat Length Calculator is free to download, with no in-app purchases.

### Is IODA Optimist free?

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

### Do Beat Length Calculator or IODA Optimist have ads?

Neither Beat Length Calculator nor IODA Optimist shows ads.

### Which is updated more often, Beat Length Calculator or IODA Optimist?

Beat Length Calculator ships an update every 2 months, and IODA Optimist every 2 months. Most recently, Beat Length Calculator was updated on August 12, 2026 and IODA Optimist on December 14, 2025.

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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.*