# BioSap vs Grain Social

The clearest difference is update cadence: Grain Social at every 2 days against BioSap's fortnightly. BioSap's advantage is iOS requirement (17.5 vs 26.0). 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.

BioSap ships an update fortnightly, Grain Social every 2 days. The most recent releases landed on September 3, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | BioSap | Grain Social |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/grain-social/id6747730230/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | — | Free |
| Size | 85 MB | 9 MB |
| Requires iOS | **17.5** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Biosystems SA](https://appshunter.io/developer/1474620889) | [Chad Miller](https://appshunter.io/developer/1822660928) |

## What reviewers say

### BioSap

[App page](https://appshunter.io/ios/app/biosap/id1474620890)

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

**In-app purchases:** none


### Grain Social

[App page](https://appshunter.io/ios/app/grain-social/id6747730230)

This photo-first social app allows users to post galleries with titles, descriptions, and locations, and share temporary 24-hour stories. It offers various feed options including following, curated, camera-based, and location-based browsing. Users can sign in with their existing Bluesky account.

**Highlights:** Photo galleries with titles and descriptions, 24-hour disappearing stories, Multiple feed options (following, curated, camera, location), Location-based browsing with maps, Bluesky account integration, Alt text for photos, EXIF data preservation

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

**In-app purchases:** none


## Frequently asked questions

### Is BioSap free?

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

### Is Grain Social free?

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

### Do BioSap or Grain Social have ads?

Neither BioSap nor Grain Social shows ads.

### Which is updated more often, BioSap or Grain Social?

BioSap ships an update fortnightly, and Grain Social every 2 days. Most recently, BioSap was updated on September 3, 2026 and Grain Social on September 17, 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.*