CSS Calculator Pro vs Triathlon Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CSS Calculator Pro
This application helps swimmers learn and calculate their critical swim speed and sprint distance index. It also allows users to predict their race times based on their performance metrics.
- Learn critical swim speed test
- Calculate critical swim speed
- Calculate sprint distance index
- Predict race time
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With this simple app you will - Learn how to perform critical swim speed test - Calculate your critical swim speed and sprint distance index - Predict your race time
Triathlon Tools
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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
Screenshots
Verdict
The clearest difference is update cadence: Triathlon Tools at every 4 days against CSS Calculator Pro's every 2 weeks. CSS Calculator Pro's advantage is iOS requirement (8.1 vs 16.4). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
CSS Calculator Pro ships an update every 2 weeks, Triathlon Tools every 4 days. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | CSS Calculator Pro | Triathlon Tools |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 2 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexey Ovod | Te Wen Chiu |
In-app purchases
CSS Calculator Pro
No in-app purchases
Triathlon Tools
No in-app purchases
Questions
Is CSS Calculator Pro free?
Is Triathlon Tools free?
Do CSS Calculator Pro or Triathlon Tools have ads?
Which is updated more often, CSS Calculator Pro or Triathlon Tools?
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