# Triathlon Tools — Calculators & utilities

> Calculators & utilities (iPhone/iPad app by Te Wen Chiu.)

- Source: https://appshunter.io/ios/app/triathlon-tools/id6777317638 (this page in markdown: same URL + `.md`)
- Developer: [Te Wen Chiu](https://appshunter.io/developer/6776316929)
- Category: Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 16.4 · 34 MB
- Languages: American English
- Released: 2026-06-10
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/triathlon-tools/id6777317638/reviews.md

## What is Triathlon Tools?

Triathlon Tools is a collection of calculators and utilities designed for triathletes and cyclists. Whether you're planning a race, dialing in your training zones, or setting up your bike, every tool you need is in one place.

Features:
• Pace Calculator — Calculate run, bike, and swim pace for any distance or target time
• Race Planner — Estimate your triathlon finish time with swim/bike/run split breakdowns
• Power Zones — Enter your FTP to see all 7 Coggan power training zones in watts
• IM Qualification — Calculate your age-graded finish time for Ironman World Championship qualification
• Climbing Calculator — Estimate climb time from power, or find the watts needed to hit a target time
• Tire Pressure — Calculate optimal front and rear tire pressure based on rider weight and tire width
• Gear Ratio — See speed for every chainring/cog combo with a color-coded heat map
• Stem Align — Use your camera to check if your bike stem and handlebar are perfectly centered
• Race Day Checklist — Track and customize your gear packing list with progress tracking


## Version history (last 3 releases)

### 1.6.0 — 2026-06-18

Race Review — Browse all race reports directly in the app. Read full blog posts with inline images, see community ratings, and leave your own review with a star rating and comment.

Like your favorite race reports with a single tap.

Paginated post list for easier browsing.

### 1.5.0 — 2026-06-13

Run Time Predictor — now with elevation and past-race mode

The run predictor is completely rebuilt. It now uses real GPX elevation data and the Minetti grade cost model to account for hills on your run split — not just flat pace math.

New in 1.5:

Use a past race — enter a race you've already done and the app back-calculates your threshold pace, then predicts your target race
Preloaded courses — Oceanside 70.3, La Quinta 70.3, and IM California run courses built in
Upload any GPX — predict any course from your GPS file
Distance mismatch warning when your reference and target races are very different lengths
The bike predictor also gains La Quinta 70.3 and IM California 140.6 as preloaded courses.

### 1.0 — 2026-06-10

No release notes.

## More apps by Te Wen Chiu

- [42 Fitness](https://appshunter.io/ios/app/42-fitness/id6776316927)

All apps by Te Wen Chiu: https://appshunter.io/developer/6776316929

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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 2026-07-28.*