# HowFast vs GoSlips

The clearest difference is in-app purchases: GoSlips at none against HowFast's 1. GoSlips also leads on ads (none vs shown) and ratings volume (49 vs 3). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. HowFast sells 1 one-off in-app purchase. GoSlips asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for HowFast against 4.9 for GoSlips. That said, the two scores are not equally well evidenced: GoSlips has 49 ratings behind it against 3, so its average is the more settled of the two.

HowFast ships an update every 3 weeks, GoSlips every 10 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HowFast | GoSlips |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/howfast-drag-race-predictor/id6762416113/reviews)** | [4.9 (49 ratings)](https://appshunter.io/ios/app/goslips/id6783205666/reviews) |
| Number of ratings | 3 | **49** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 37 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [DtimesTwo Technologies LLC](https://appshunter.io/developer/1894087614) | [Logan Back](https://appshunter.io/developer/1675706718) |

## What reviewers say

### 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 |


### GoSlips

[App page](https://appshunter.io/ios/app/goslips/id6783205666)

View live drag racing time slips directly on your phone. Track elapsed time, reaction time, speed, and more as races happen. Follow events from anywhere, whether you're at the track or at home.

**Highlights:** Live time slip viewing, Real-time race data, Track switching, Search past slips, Follow from any location

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

**In-app purchases:** none


## Frequently asked questions

### Is HowFast free?

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

### Is GoSlips free?

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

### Which has better reviews, HowFast or GoSlips?

HowFast is rated higher. HowFast averages 5.0 out of 5 from 3 ratings, while GoSlips averages 4.9 from 49 ratings.

### Do HowFast or GoSlips have ads?

HowFast shows ads; GoSlips does not.

### Which is updated more often, HowFast or GoSlips?

HowFast ships an update every 3 weeks, and GoSlips every 10 days. Most recently, HowFast was updated on October 12, 2026 and GoSlips on October 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.*