Legacy TriDot vs Zygo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Legacy TriDot
This app uses big data and advanced analytics to optimize your future training and race results. It seamlessly auto-syncs with popular fitness tracking devices.
- Big data analytics
- Optimized future training
- Race result prediction
- Seamless auto-sync
- Garmin integration
- Polar integration
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TriDot’s triathlon training app isn’t just another app to track and monitor your past training. Its big data and advanced analytics optimize your future training and race results. It seamlessly auto-syncs with Garmin, Polar and other services. Subject to the Apple License agreement found at the following URL https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Zygo
Access over 500 guided swim workouts paired with music. Track your progress with lap counting and a tempo trainer. Stay connected with walkie-talkie functionality and manage device settings.
- 500+ guided swim workouts
- Music integration
- Lap counting
- Tempo trainer
- Walkie-talkie feature
- Battery level monitoring
- Firmware updates
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Make the most of your Zygo with our app. In addition to a library of over 500 guided swim workouts paired to music, our app shows your battery levels and counts your laps, and has a tempo trainer and walkie-talkie. It also enables firmware updates for ongoing feature additions and enhancements.
Screenshots
Verdict
The clearest difference is review sentiment: Legacy TriDot at 97% against Zygo's 43%. Legacy TriDot also leads on rating (4.7 vs 4.2) and update cadence (fortnightly vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Legacy TriDot sells 5 in-app purchases, starting at $14.99 per month and Zygo sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Legacy TriDot holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 263 and 135 respectively. Written reviews point the same way: 97% of Legacy TriDot's written reviews are positive against 43% of Zygo's.
Legacy TriDot ships an update fortnightly, Zygo every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Legacy TriDot | Zygo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (263 ratings) — better | 4.2 (135 ratings) |
| Positive reviews | 97.0% of reviews — better | 42.9% of reviews |
| Number of ratings | 263 — better | 135 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 95 MB | 101 MB |
| Age rating | 4+ | 4+ |
| Developer | Predictive Fitness, Inc. | Swimmersive Co |
Customer experience
Legacy TriDot
Zygo
Bugs and requests
Legacy TriDot
Reported bugs
2 issues- Login issues
- Syncing problems with third-party apps
Requested features
2 requests- Perceived effort tracking
- More flexibility in workout scheduling
Zygo
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Legacy TriDot
- Lifestyle$14.991 Month
- Essentials$39.991 Month
- Complete$99.991 Month
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- Mark Allen Edition$149.991 Month
- Premium$249.991 Month
Zygo
- Monthly Subscription14 Days trial$4.991 Month
- Yearly Subscription14 Days trial$49.991 Year
