# RunFormAI vs Impulse

The clearest difference is update cadence: Impulse at every 4 days against RunFormAI's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RunFormAI ships an update every 3 weeks, Impulse every 4 days. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | RunFormAI | Impulse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/impulse-sprint-mechanics/id6786762191/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free |
| Size | 16 MB | 60 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUI GAO](https://appshunter.io/developer/1896056859) | [KEERTAN RAO SAWTELL](https://appshunter.io/developer/6786762193) |

## What reviewers say

### RunFormAI

[App page](https://appshunter.io/ios/app/runformai/id6765745720)

**In-app purchases:** none


### Impulse

[App page](https://appshunter.io/ios/app/impulse-sprint-mechanics/id6786762191)

Analyze your sprint acceleration with detailed mechanics. Film your first few steps in slow motion to get insights on shin angle, ground contact time, and flight time without specialized equipment.

**Highlights:** Shin angle at ground contact, Ground contact time, Flight time per step, Calculated speed per step, Session history tracking, Mechanics correlation with speed

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

**In-app purchases:** none


## Frequently asked questions

### Is RunFormAI free?

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

### Is Impulse free?

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

### Do RunFormAI or Impulse have ads?

Neither RunFormAI nor Impulse shows ads.

### Which is updated more often, RunFormAI or Impulse?

RunFormAI ships an update every 3 weeks, and Impulse every 4 days. Most recently, RunFormAI was updated on October 16, 2026 and Impulse on October 6, 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.*