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tcSpeeds

tcSpeeds

Sailing Speed Instrument

9 ratings
2 reviews
⚽ Sports
🗺️ Navigation
$4.99 Free
In-App Purchases

Lowest price: Free 3 years ago (-100%)

↓

Price history

Details

  • Released
  • Updated

Features

Developer

transitional continuum
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tcSpeeds screenshot #8 for iPhone
iphone
ipad
watch
📉--100%
Price change↘︎
🧾$2.99
In-App Purchase↘︎
⭐2
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦~ in 7 months
Updates frequency↘︎
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About

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.

✓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
Show original description

What's New in tcSpeeds

3.4

March 25, 2026

v3.4 — Wind & Watch upgrade • Apple Watch: True Wind Speed (TWS) now shown on Wind Compass in yellow, Apparent Wind Speed (AWS) in green — both with color-coded direction triangles • Watch speed display fills the full Apple Watch Ultra screen with a cleaner layout • Watch complication now shows the tcSpeeds icon on your watch face • All watch numbers grey out when iPhone connection is lost • Map GPS track color coding fixed — no more disappearing track on zoom/pan • Connect to Calypso wind sensor now requires purchase (as intended)

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1

In-App Purchases

$2.99

Advanced Performance Features

Waypoint, PPI, VMG, CrossTrack reporting

User reviews

Most RecentHighest RatedLowest Rated

Fun to use!

Lots of unique features. I love the Vectors page and Max speed audio alarm. Great companion to my chartplotter!
SuperMaxUniverseSuperMaxUniverse

Update- Tc generously corrected the problem .

A week ago I paid $6.99 for this app now it is free and you have to buy features. These should be free to current owners!
AceArnieAceArnie

Response from developer

Hi AceArnie, Sorry about that. This is my first app and I did not know how to proceed with this pricing change. I agree with you. Please send me an email at support@transitionalcontinuum.com and we can arrange that. -Tomas

FAQ

What devices does tcSpeeds support?

tcSpeeds is designed for iPhones and GPS-equipped iPads. It also features an Apple Watch extension for convenient access to key metrics and remote control.

Does tcSpeeds require external hardware?

No, tcSpeeds stands on its own and uses your device's internal GPS, accelerometers, and compass. For wind measurements, an external Calypso Ultrasonic Wind sensor is required.

How easy is tcSpeeds to set up?

tcSpeeds is designed for minimal operational burden. Zero setup is required; simply install, launch, and tap the start button.

What kind of performance data does tcSpeeds provide?

It offers current speed, average speeds, maximum speed, directional speeds, velocity made good (VMG), wind measurements, and a Pilot Performance Index (PPI).

Can I compare my performance with others using tcSpeeds?

Yes, you can compare your performance metrics, including your Pilot Performance Index (PPI), with friends or against your autopilot.

What is the Pilot Performance Index (PPI)?

The Pilot Performance Index (PPI) is a proprietary computation that measures your performance on a straight course, allowing you to gauge your skill at the controls.

How often is tcSpeeds updated?

The latest version is 3.4, last updated on March 25, 2026. Future updates are planned to support more sensors.

What is the age rating for tcSpeeds?

tcSpeeds has an age rating of 4+, making it suitable for a wide range of users.