Comparison

Interstellar vs RedSum

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Interstellar

An app for Mbin/Lemmy/PieFed.

Free

🌐 Social Networking

★ 4.84 ratingsView app →

About

Interstellar

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

Read full description

Interstellar is a free and open source, fediverse client, allowing you to access your Mbin/Lemmy/PieFed accounts and interact with your favorite communities. If you encounter any bugs or would like to request a feature, please report it on the GitHub repository (github.com/interstellar-app/interstellar) or the Interstellar magazine (kbin.earth/m/interstellar).

About

RedSum

Features

Read full description

Reddit client which uses the free Reddit api and supports summarization of the content.

Screenshots

Interstellar4 screens

RedSum4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level

Interstellar versus RedSum: the parameters behind the verdict, then further details
Parameter	Interstellar	RedSum
Price	Free	Free
Rating	4.8 (4 ratings) — better	—
Positive reviews	100.0% of reviews	—
Number of ratings	4 — better	—
Update frequency	Every 2 months	Every 5 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	13.0 — better	26.0
Further details — not scored
Size	79 MB	35 MB
Age rating	17+	4+
Developer	John Randall	Joao Valente

In-app purchases

None

Interstellar

No in-app purchases

None

RedSum

No in-app purchases

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.