Comparison

CSS Calculator Pro vs Triathlon Tools

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Learn critical swim speed test
  • Calculate critical swim speed
  • Calculate sprint distance index
  • Predict race time
Features
Read full description

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

About

Triathlon Tools

Features
Read full description

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

CSS Calculator Pro3 screens
Triathlon Tools4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 6 level
CSS Calculator Pro versus Triathlon Tools: the parameters behind the verdict, then further details
ParameterCSS Calculator ProTriathlon Tools
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.1 — better16.4
Further details — not scored
Size2 MB34 MB
Age rating4+4+
DeveloperAlexey OvodTe Wen Chiu

In-app purchases

None

CSS Calculator Pro

No in-app purchases

None

Triathlon Tools

No in-app purchases

Questions

Is CSS Calculator Pro free?
CSS Calculator Pro is free to download, with no in-app purchases.
Is Triathlon Tools free?
Triathlon Tools is free to download, with no in-app purchases.
Do CSS Calculator Pro or Triathlon Tools have ads?
Neither CSS Calculator Pro nor Triathlon Tools shows ads.
Which is updated more often, CSS Calculator Pro or Triathlon Tools?
CSS Calculator Pro ships an update every 2 weeks, and Triathlon Tools every 4 days. Most recently, CSS Calculator Pro was updated on October 8, 2026 and Triathlon Tools on October 15, 2026.

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