# Waveflow vs Bio Optimizer

The clearest difference is in-app purchases: Waveflow at none against Bio Optimizer's 2. Bio Optimizer's advantage is update cadence (every 4 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Bio Optimizer sells 2 in-app purchases, starting at $19.99 per month. Waveflow asks for nothing beyond the download.

Waveflow ships an update every 4 months, Bio Optimizer every 4 days. The most recent releases landed on September 22, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Waveflow | Bio Optimizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (24 ratings)](https://appshunter.io/ios/app/waveflow-gratitude-community/id1626797161/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 39 MB | 76 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [WeaveLines](https://appshunter.io/developer/1543363390) | [YOU SUNG CHYUNG](https://appshunter.io/developer/1881798464) |

## What reviewers say

### Waveflow

[App page](https://appshunter.io/ios/app/waveflow-gratitude-community/id1626797161)

Amplify your gratitude practice with daily prompts and a supportive community. Share your journey visually with friends and family, and discover the science-backed benefits of consistent gratitude for improved well-being and connection.

**Highlights:** Daily journaling prompts, Gratitude community, Visual sharing with friends/family, Accountability buddies, Follow friends' journeys, Themed gratitude rotations

**Features:** macOS Compatibility

**In-app purchases:** none


### Bio Optimizer

[App page](https://appshunter.io/ios/app/bio-optimizer/id6759941870)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $19.99 | per month |
| Annual Premium | $119.00 | per year |


## Frequently asked questions

### Is Waveflow free?

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

### Is Bio Optimizer free?

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

### Do Waveflow or Bio Optimizer have ads?

Neither Waveflow nor Bio Optimizer shows ads.

### Which is updated more often, Waveflow or Bio Optimizer?

Waveflow ships an update every 4 months, and Bio Optimizer every 4 days. Most recently, Waveflow was updated on September 22, 2026 and Bio Optimizer on October 13, 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.*