CSS Calculator Pro vs Swim Time Calculator
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
Swim Time Calculator
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Optimize your swim performance with our new Swim Pace Calculator! This app helps coaches and swimmers calculate potential improvements in clean swim time by analyzing changes in two key parameters: stroke rate (SR) and stroke length (SL). Developed by the Czech analysis company umimplavat.cz, this tool is designed to provide actionable insights to enhance training and competition outcomes.
Screenshots
Verdict
The clearest difference is update cadence: CSS Calculator Pro at every 2 weeks against Swim Time Calculator's every 5 weeks. CSS Calculator Pro also leads on iOS requirement (8.1 vs 13.0). 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, Swim Time Calculator every 5 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | CSS Calculator Pro | Swim Time Calculator |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 2 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexey Ovod | umimplavat.cz |
In-app purchases
CSS Calculator Pro
No in-app purchases
Swim Time Calculator
No in-app purchases
Questions
Is CSS Calculator Pro free?
Is Swim Time Calculator free?
Do CSS Calculator Pro or Swim Time Calculator have ads?
Which is updated more often, CSS Calculator Pro or Swim Time Calculator?
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