# tcSpeeds vs SailTimer API™

tcSpeeds and SailTimer API™ both sit at 4.9 stars, but that hides the real split: 100% of tcSpeeds's written reviews are positive against 0% of SailTimer API™'s. tcSpeeds also leads on monetization model (free vs free with in-app purchases) and ratings volume (10 vs 1). SailTimer API™'s advantage is update cadence (every 4 weeks vs every 7 months). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. tcSpeeds sells 1 one-off in-app purchase and SailTimer API™ sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for tcSpeeds against 5.0 for SailTimer API™. That said, the two scores are not equally well evidenced: tcSpeeds has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 100% of tcSpeeds's written reviews are positive against 0% of SailTimer API™'s.

tcSpeeds ships an update every 7 months, SailTimer API™ every 4 weeks. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | tcSpeeds | SailTimer API™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (10 ratings)](https://appshunter.io/ios/app/tcspeeds/id1441225371/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sailtimer-api/id1562869275/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 19 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [transitional continuum](https://appshunter.io/developer/1441225370) | [SailTimer Inc.](https://appshunter.io/developer/326309854) |

## What reviewers say

### tcSpeeds

[App page](https://appshunter.io/ios/app/tcspeeds/id1441225371)

This app provides advanced sailing performance metrics using your device's GPS and sensors. It offers detailed speed, wind, and directional measurements, along with a proprietary performance index. Easily track your progress and compare it with others, with zero setup required.

**Highlights:** Advanced speed and velocity measurements, Proprietary Pilot Performance Index (PPI), Wind measurement with optional sensor, Waypoint navigation and tracking, Apple Watch extension, Real-time performance alerts

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Performance Features | $2.99 | one-time |


### 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 |


## Frequently asked questions

### Is tcSpeeds free?

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

### Is SailTimer API™ free?

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

### Which has better reviews, tcSpeeds or SailTimer API™?

SailTimer API™ is rated higher. tcSpeeds averages 4.9 out of 5 from 10 ratings, while SailTimer API™ averages 5.0 from 1 ratings.

### Do tcSpeeds or SailTimer API™ have ads?

Neither tcSpeeds nor SailTimer API™ shows ads.

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

tcSpeeds ships an update every 7 months, and SailTimer API™ every 4 weeks. Most recently, tcSpeeds was updated on September 30, 2026 and SailTimer API™ on October 1, 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.*