# Quell Flex vs Blue Heron Pilates

The clearest difference is update cadence: Blue Heron Pilates at every 4 months against Quell Flex's every 35 months. 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.

Quell Flex ships an update every 35 months, Blue Heron Pilates every 4 months. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Quell Flex | Blue Heron Pilates |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 4 months** |
| Size | 23 MB | 113 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [NeuroMetrix, Inc.](https://appshunter.io/developer/972079953) | [Spotbee, Inc.](https://appshunter.io/developer/1465231993) |

## What reviewers say

### Quell Flex

[App page](https://appshunter.io/ios/app/quell-flex/id1507976263)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blue Heron Pilates

[App page](https://appshunter.io/ios/app/blue-heron-pilates/id6737769186)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Quell Flex free?

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

### Is Blue Heron Pilates free?

Blue Heron Pilates is free to download, with no in-app purchases.

### Do Quell Flex or Blue Heron Pilates have ads?

Neither Quell Flex nor Blue Heron Pilates shows ads.

### Which is updated more often, Quell Flex or Blue Heron Pilates?

Quell Flex ships an update every 35 months, and Blue Heron Pilates every 4 months. Most recently, Quell Flex was updated on November 7, 2026 and Blue Heron Pilates on November 8, 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.*