# SailTimer API™ vs GPS Metrics

The clearest difference is in-app purchases: GPS Metrics at none against SailTimer API™'s 6. SailTimer API™'s advantage is update cadence (every 4 weeks vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SailTimer API™ sells 6 in-app purchases, starting at $2.99 per month. GPS Metrics asks for nothing beyond the download.

SailTimer API™ ships an update every 4 weeks, GPS Metrics every 9 months. The most recent releases landed on August 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | SailTimer API™ | GPS Metrics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sailtimer-api/id1562869275/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 7 MB |
| Requires iOS | 16.6 | **16.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SailTimer Inc.](https://appshunter.io/developer/326309854) | [Berend Hartman](https://appshunter.io/developer/1847181865) |

## What reviewers say

### SailTimer API™

[App page](https://appshunter.io/ios/app/sailtimer-api/id1562869275)

This app bridges the gap between your SailTimer Wind Instrument and other navigation or performance apps. It also offers access to crowdsourced wind maps and marine weather animations through a subscription, enhancing your sailing experience with real-time wind data.

**Highlights:** Integrates with SailTimer Wind Instrument, Delivers wind data to partner apps, Crowdsourced wind maps, Marine weather animations, Supports chartplotter apps, Real-time wind data

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crowdsourced Wind Maps - Monthly | $2.99 | per month |
| WNI Marine Weather - Monthly | $2.99 | per month |
| AI Forecasts - Monthly | $2.99 | per month |
| Crowdsourced Wind Maps - Yearly | $19.99 | per year |
| WNI Marine Weather - Yearly | $19.99 | per year |
| AI Forecasts - Yearly | $19.99 | per year |


### GPS Metrics

[App page](https://appshunter.io/ios/app/gps-metrics/id6755637713)

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

**In-app purchases:** none


## Frequently asked questions

### Is SailTimer API™ free?

SailTimer API™ is free to download, with in-app purchases available.

### Is GPS Metrics free?

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

### Do SailTimer API™ or GPS Metrics have ads?

Neither SailTimer API™ nor GPS Metrics shows ads.

### Which is updated more often, SailTimer API™ or GPS Metrics?

SailTimer API™ ships an update every 4 weeks, and GPS Metrics every 9 months. Most recently, SailTimer API™ was updated on August 19, 2026 and GPS Metrics on September 14, 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.*