# Racing Slips vs HowFast

The clearest difference is ads: Racing Slips at none against HowFast's shown. Racing Slips also leads on update cadence (every 4 days vs every 3 weeks) and iOS requirement (15.6 vs 26.2). HowFast's advantage is ratings volume (3 vs 1). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Racing Slips sells 2 in-app purchases, starting at $4.99 per month and HowFast sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Racing Slips against 5.0 for HowFast. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Racing Slips ships an update every 4 days, HowFast every 3 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Racing Slips | HowFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/racing-slips/id1412589857/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/howfast-drag-race-predictor/id6762416113/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 19 MB | 15 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Stephan Monette](https://appshunter.io/developer/1299469285) | [DtimesTwo Technologies LLC](https://appshunter.io/developer/1894087614) |

## What reviewers say

### Racing Slips

[App page](https://appshunter.io/ios/app/racing-slips/id1412589857)

Record and access your drag racing time slips digitally. Calculate density altitude to predict your next ET dial and eliminate the need for paper slips. View qualification, pairing, and ladder reports easily.

**Highlights:** Digital time slip recording, Density altitude calculation, ET dial prediction, Qualification reports, Pairing reports, Ladder reports

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Sharing | $4.99 | per month |
| Annual Premium Access | $8.99 | per year |


### HowFast

[App page](https://appshunter.io/ios/app/howfast-drag-race-predictor/id6762416113)

Predict your drag race elapsed times with real vehicle specs and atmospheric conditions. The app learns from your runs to improve accuracy and logs every pass for detailed analysis. Upgrade for advanced features like OBD-II connectivity and multi-run comparisons.

**Highlights:** Elapsed time prediction, Real-time density altitude correction, Automatic run detection, Run history logbook, Export to DynoLog, OBD-II connectivity (Pro), Multi-run comparison (Pro)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HowFast Pro | $7.99 | one-time |


## Frequently asked questions

### Is Racing Slips free?

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

### Is HowFast free?

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

### Which has better reviews, Racing Slips or HowFast?

Racing Slips and HowFast are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Racing Slips or HowFast have ads?

HowFast shows ads; Racing Slips does not.

### Which is updated more often, Racing Slips or HowFast?

Racing Slips ships an update every 4 days, and HowFast every 3 weeks. Most recently, Racing Slips was updated on October 14, 2026 and HowFast on October 12, 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.*