# Hotlap vs Pax Calculate

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.

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.

## The numbers

| Metric | Hotlap | Pax Calculate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (79 ratings)](https://appshunter.io/ios/app/hotlap/id1277202844/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pax-calculate/id6757114439/reviews)** |
| Number of ratings | **79** | 1 |
| Positive reviews | 69.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 118 MB | 3 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Extravehicular Activity, Inc.](https://appshunter.io/developer/1277202843) | [DAVID DEAN WHITENER](https://appshunter.io/developer/1864656677) |

## What reviewers say

### Hotlap

[App page](https://appshunter.io/ios/app/hotlap/id1277202844)

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.

**Highlights:** GPS lap timing, Data logging, Performance comparison, Community features, Personal best tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hotlap Plus Monthly | $2.99 | per month |
| Hotlap Plus Annual | $23.99 | per year |

**What reviewers like**

- 👍 Simple and easy to use
- 🏎️ Great for track days
- 🤝 Good for comparing with friends
- 💰 Free to use
- 🏎️ Accurate lap times

**What reviewers complain about**

- 🐛 Lost profile/data after phone transfer
- 🐛 App is buggy and doesn't always work
- 🐛 Photo upload feature broken
- 🐛 OBD2 recording feature not working
- 🐛 Live delta time not working

**Reported bugs**

- Data lost after phone transfer
- App not working/updating
- Photo upload stops at 90%
- App is very buggy and slow
- OBD2 recording feature broken

**Requested features**

- Record times while screen is off
- CarPlay support
- Update profile picture setting
- Make app work in background
- More accurate track layouts


### Pax Calculate

[App page](https://appshunter.io/ios/app/pax-calculate/id6757114439)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hotlap free?

Hotlap is free to download, with in-app purchases available.

### Is Pax Calculate free?

Pax Calculate is free to download, with no in-app purchases.

### Which has better reviews, Hotlap or Pax Calculate?

Pax Calculate is rated higher. Hotlap averages 4.3 out of 5 from 79 ratings, while Pax Calculate averages 5.0 from 1 ratings.

### Do Hotlap or Pax Calculate have ads?

Neither Hotlap nor Pax Calculate shows ads.

### Which is updated more often, Hotlap or Pax Calculate?

Hotlap ships an update every 4 weeks, and Pax Calculate every 3 weeks. Most recently, Hotlap was updated on October 29, 2026 and Pax Calculate on September 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*