# Transponder

> Transponder (iPhone/iPad app by Pangea Systems LLC.)

- Source: https://appshunter.io/ios/app/transponder/id898369229 (this page in markdown: same URL + `.md`)
- Developer: [Pangea Systems LLC](https://appshunter.io/developer/898369232)
- Category: Sports, Navigation
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 12 MB
- Languages: American English
- Released: 2014-07-26
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/transponder/id898369229/reviews.md

## What is Transponder?

Transponder is for yacht race tracking at Sailtracker.net.  Transponder uses your iPhone to communicate realtime position and performance data to the Sailtracker website where a race can be watched live or later via playback.  If your phone loses signal temporarily while outside of mobile phone tower range GPS and performance information is cached and uploaded when signal returns.

Note: continued use of GPS running in the background can dramatically decrease battery life.  It is recommended to connect to an external power source for extended use.


## Version history (last 5 releases)

### 2.3.82 — 2024-03-14

Updated UI buttons.  HTTPS-only for data communication.  New feature to scan QR code to configure for an Event.

### 2.2.22 — 2019-07-10

Bug fixes.  Improved autostart functionality.

### 2.0.17 — 2018-08-15

Fixed issue where sometimes GPS is not reporting speed.

### 2.0.13 — 2018-07-17

Improved background operation, improved autostart functionality.

### 1.2 — 2017-07-27

Bug fixes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-16.*