# HowFast vs Revvo

The clearest difference is ads: Revvo at none against HowFast's shown. Revvo also leads on update cadence (every 6 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. HowFast sells 1 one-off in-app purchase and Revvo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

HowFast ships an update every 3 weeks, Revvo every 6 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HowFast | Revvo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/howfast-drag-race-predictor/id6762416113/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 5 MB |
| Requires iOS | 26.2 | **26.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [DtimesTwo Technologies LLC](https://appshunter.io/developer/1894087614) | [Fabio Silva](https://appshunter.io/developer/6775321070) |

## 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 |


### Revvo

[App page](https://appshunter.io/ios/app/revvo-0-100-accelerometer/id6775321068)

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Revvo Pro | $12.99 | one-time |


## Frequently asked questions

### Is HowFast free?

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

### Is Revvo free?

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

### Do HowFast or Revvo have ads?

HowFast shows ads; Revvo does not.

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

HowFast ships an update every 3 weeks, and Revvo every 6 days. Most recently, HowFast was updated on October 31, 2026 and Revvo on October 28, 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.*