# Accelerometer ∞ vs MyRespondr

The clearest difference is in-app purchases: MyRespondr at none against Accelerometer ∞'s 2. MyRespondr also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Accelerometer ∞ sells 2 in-app purchases, starting at $1.99 per month. MyRespondr asks for nothing beyond the download.

Accelerometer ∞ ships an update every 2 weeks, MyRespondr every 3 weeks. The most recent releases landed on October 11, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Accelerometer ∞ | MyRespondr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (65 ratings)](https://appshunter.io/ios/app/accelerometer/id6621273087/reviews)** | — |
| Number of ratings | **65** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 20 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fawkes Wei](https://appshunter.io/developer/432767536) | [Respondr Inc](https://appshunter.io/developer/1876095477) |

## What reviewers say

### Accelerometer ∞

[App page](https://appshunter.io/ios/app/accelerometer/id6621273087)

Visualize device motion data in real-time with dynamic graphs. Analyze sensor information, calibrate your device, and explore various possibilities. This utility app offers a unique perspective on your device's movement.

**Highlights:** Real-time motion data visualization, Stunning graph displays, Sensor calibration, Data analysis, Explore endless possibilities

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Lifetime | $9.99 | one-time |


### MyRespondr

[App page](https://appshunter.io/ios/app/myrespondr/id6758968593)

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

**In-app purchases:** none


## Frequently asked questions

### Is Accelerometer ∞ free?

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

### Is MyRespondr free?

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

### Do Accelerometer ∞ or MyRespondr have ads?

Accelerometer ∞ shows ads; MyRespondr does not.

### Which is updated more often, Accelerometer ∞ or MyRespondr?

Accelerometer ∞ ships an update every 2 weeks, and MyRespondr every 3 weeks. Most recently, Accelerometer ∞ was updated on October 11, 2026 and MyRespondr on September 9, 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.*