# DriverMonitor vs Fox + Son Jetmax

The clearest difference is ratings volume: DriverMonitor at 19 against Fox + Son Jetmax's 2. DriverMonitor also leads on update cadence (every 6 weeks vs every 3 months) and iOS requirement (12.0 vs 15.1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. DriverMonitor sells 5 in-app purchases, starting at $19.99 per month and Fox + Son Jetmax sells 1 in-app purchase, starting at $7.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for DriverMonitor against 5.0 for Fox + Son Jetmax. That said, the two scores are not equally well evidenced: DriverMonitor has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

DriverMonitor ships an update every 6 weeks, Fox + Son Jetmax every 3 months. The most recent releases landed on June 1, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | DriverMonitor | Fox + Son Jetmax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (19 ratings)](https://appshunter.io/ios/app/drivermonitor/id1423694314/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fox-plus-son-jetmax/id6748326003/reviews)** |
| Number of ratings | **19** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Subscription | Subscription |
| Size | 37 MB | 16 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Leisure Hound Sports, Inc](https://appshunter.io/developer/1287375555) | [Trophy Inc.](https://appshunter.io/developer/1752591571) |

## What reviewers say

### DriverMonitor

[App page](https://appshunter.io/ios/app/drivermonitor/id1423694314)

This app provides in-car, glanceable live timing and scoring for motorsports. It displays your race position, lap times, and competitor data to help you compete effectively. Ideal for sprint, endurance, and qualifying sessions.

**Highlights:** Glanceable live timing and scoring, Real-time race position tracking, Lap time and split time display, Competitor class leader and nearby car data, Sprint, endurance, and qualifying session support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly auto-renewing - SPRINT | $19.99 | per month |
| Monthly auto-renewing - ENDURO | $34.99 | per month |
| Annual auto-renewing | $39.99 | per year |
| Single race weekend-SPRINT | $11.99 | one-time |
| Single race weekend-ENDURO | $24.99 | one-time |


### Fox + Son Jetmax

[App page](https://appshunter.io/ios/app/fox-plus-son-jetmax/id6748326003)

This application simplifies jetting calculations for Rotax engines, factoring in weather and altitude. It provides racers with precise tuning recommendations, including relative horsepower and an interactive gear chart, to optimize performance on race day.

**Highlights:** Rotax engine jetting calculator, Weather and altitude adjustments, Relative horsepower calculation, Interactive gear chart, Rotax tuning tips

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Yearly | $7.99 | per year |


## Frequently asked questions

### Is DriverMonitor free?

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

### Is Fox + Son Jetmax free?

Fox + Son Jetmax is free to download, with in-app purchases available.

### Which has better reviews, DriverMonitor or Fox + Son Jetmax?

Fox + Son Jetmax is rated higher. DriverMonitor averages 4.9 out of 5 from 19 ratings, while Fox + Son Jetmax averages 5.0 from 2 ratings.

### Do DriverMonitor or Fox + Son Jetmax have ads?

Neither DriverMonitor nor Fox + Son Jetmax shows ads.

### Which is updated more often, DriverMonitor or Fox + Son Jetmax?

DriverMonitor ships an update every 6 weeks, and Fox + Son Jetmax every 3 months. Most recently, DriverMonitor was updated on June 1, 2026 and Fox + Son Jetmax on July 4, 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.*