Hotlap vs Pax Calculate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hotlap
This app offers GPS lap timing and data logging for track day enthusiasts. Compare your performance with others in a community setting to improve your personal bests.
- GPS lap timing
- Data logging
- Performance comparison
- Community features
- Personal best tracking
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Experience the competitive spirit and camaraderie of track days from anywhere. Hotlap is an exciting new community for track day enthusiasts. With intuitive GPS lap timing and data logging you can ealiy compare your performance with fellow drivers to achieve your next personal best.
Pax Calculate
Easily calculate and compare indexed times for autocross competitions. Instantly see what time you need to beat competitors in different classes, with options for standard PAX and ProSolo PSI indexes. Perfect for racers needing quick, accurate calculations at events or when reviewing results.
- Calculate PAX indexed times
- Compare times across classes
- View PAX and PSI class factors
- Switch between PAX and PSI indexes
- No login or data collection
- No advertisements
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PAX Calculator makes it easy to calculate and compare indexed times for SCCA autocross competition. FEATURES: - Calculate PAX indexed times from raw times - Compare times between different classes - See exactly what time you need to beat competitors in other classes - View complete list of current PAX and PSI class factors - Switch between standard PAX and ProSolo PSI indexes - No login required, no ads, no data collection Whether you're trying to figure out your indexed time or comparing your performance against competitors in different classes, PAX Calculator gives you instant answers. Perfect for autocross competitors who want quick, accurate calculations at events or while reviewing results. This is an independent application created by an SCCA member. It is not affiliated with, endorsed by, or an official product of the Sports Car Club of America™ (SCCA®).
Screenshots
Verdict
The clearest difference is rating: Pax Calculate at 5.0 against Hotlap's 4.3. Pax Calculate also leads on in-app purchases (none vs 2). Hotlap's advantage is ratings volume (79 vs 1) and iOS requirement (15.1 vs 26.0). On price, update cadence, ads 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. Hotlap sells 2 in-app purchases, starting at $2.99 per month. Pax Calculate asks for nothing beyond the download.
Pax Calculate holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Hotlap has 79 ratings behind it against 1, so its average is the more settled of the two.
Hotlap ships an update every 4 weeks, Pax Calculate every 3 weeks. The most recent releases landed on October 29, 2026 and September 25, 2026 respectively.
| Parameter | Hotlap | Pax Calculate |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (79 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 69.4% of reviews | — |
| Number of ratings | 79 — better | 1 |
| Update frequency | Every 4 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 118 MB | 3 MB |
| Age rating | 9+ | 4+ |
| Developer | Extravehicular Activity, Inc. | DAVID DEAN WHITENER |
Customer experience
Hotlap
Pax Calculate
Bugs and requests
Hotlap
Reported bugs
10 issues- Data lost after phone transfer
- App not working/updating
- Photo upload stops at 90%
- App is very buggy and slow
- OBD2 recording feature broken
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- Live delta time feature broken
- Cannot select custom car
- Sessions not being recorded
- OBD2 adapters not recognized
- App not functioning as expected
Requested features
7 requests- Record times while screen is off
- CarPlay support
- Update profile picture setting
- Make app work in background
- More accurate track layouts
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- Support for 'other' car type
- Improve telemetry graph readability
Pax Calculate
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Hotlap
- Hotlap Plus Monthly$2.991 Month
- Hotlap Plus Annual$23.991 Year
Pax Calculate
No in-app purchases
Questions
Is Hotlap free?
Is Pax Calculate free?
Which has better reviews, Hotlap or Pax Calculate?
Do Hotlap or Pax Calculate have ads?
Which is updated more often, Hotlap or Pax Calculate?
Other comparisons
