# Interstellar vs RedSum

The clearest difference is iOS requirement: Interstellar at 13.0 against RedSum's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Interstellar ships an update every 2 months, RedSum every 5 weeks. The most recent releases landed on July 6, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Interstellar | RedSum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/interstellar-fediverse-client/id6745356296/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 79 MB | 35 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [John Randall](https://appshunter.io/developer/1811885466) | [Joao Valente](https://appshunter.io/developer/1689831331) |

## What reviewers say

### Interstellar

[App page](https://appshunter.io/ios/app/interstellar-fediverse-client/id6745356296)

Access and interact with communities across Mbin, Lemmy, and PieFed. This open-source client provides a unified platform for engaging with your favorite fediverse content.

**Highlights:** Access Mbin, Lemmy, and PieFed accounts, Interact with fediverse communities, Open-source platform, Bug reporting via GitHub, Feature requests via magazine

**In-app purchases:** none


### RedSum

[App page](https://appshunter.io/ios/app/redsum/id6757315148)

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

**In-app purchases:** none


## Frequently asked questions

### Is Interstellar free?

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

### Is RedSum free?

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

### Do Interstellar or RedSum have ads?

Neither Interstellar nor RedSum shows ads.

### Which is updated more often, Interstellar or RedSum?

Interstellar ships an update every 2 months, and RedSum every 5 weeks. Most recently, Interstellar was updated on July 6, 2026 and RedSum 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.*