Comparison

Comm Messenger vs fullmoon

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

Head to head
About

Comm Messenger

This app allows users to create and join private chat communities hosted on personal keyservers. It offers a hierarchical thread structure similar to Discord channels and nested sidebars like Slack. The platform supports customizable community features through an app library, starting with a calendar app.

Highlights
  • Decentralized keyserver hosting
  • Nested chat threads
  • Slack-style sidebars
  • Community app library
  • Calendar app integration
Features
Read full description

- In Comm, each community is hosted on somebody's keyserver. - You can set up a keyserver on your laptop or in the cloud. - Comm won't host your keyserver for you. (We don't want to have access to your data!) - You don't need a keyserver to join a community, but you do need one to create a community. Keyservers enable us to offer the sort of sophisticated feature set that typically relies on corporate servers on the cloud, without sacrificing the privacy of our users. - Each community on Comm contains a tree structure of chat threads. Our threads are sort of like channels in Discord, but they can be nested inside each other. - Comm supports "sidebars", which are sort of like threads in Slack. Sidebars are created in response to a message in a parent thread. - Along with the default chat functionality, Comm also supports a library of apps to customize your community. We're launching with a Calendar app, and have more apps in the pipeline!

About

fullmoon

This app provides a private and offline way to interact with local large language models. It runs models directly on your device, optimized for Apple silicon, and is available across multiple Apple platforms. Personalize your experience and integrate with other apps via Shortcuts.

Highlights
  • Private LLM chat
  • Fully offline operation
  • On-device model execution
  • Cross-platform Apple support
  • Customizable themes and fonts
  • Shortcut integration
Read full description

the simplest way to use private LLMs: works fully offline and private when you don’t have internet. runs models on-device optimized for Apple silicon. works on every platform: iOS, iPadOS, macOS, visionOS personalize: adjust the theme, fonts, and system prompt in the app. Shortcut: chat with fullmoon or get an output from a local model to use with other actions. free, open source, private.

Screenshots

Comm Messenger4 screens
fullmoon4 screens

Verdict

The call

The clearest difference is rating: Comm Messenger at 5.0 against fullmoon's 4.4. Comm Messenger also leads on review sentiment (100% vs 78%) and update cadence (every 5 days vs every 10 days). fullmoon's advantage is ratings volume (100 vs 12) and device support (4 vs 2). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

Comm Messenger holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: fullmoon has 100 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 100% of Comm Messenger's written reviews are positive against 78% of fullmoon's.

UpkeepUpdate frequency

Comm Messenger ships an update every 5 days, fullmoon every 10 days. The most recent releases landed on September 10, 2026 and August 11, 2026 respectively.

Scorecard6 real differences · 4 level
Comm Messenger versus fullmoon: the parameters behind the verdict, then further details
ParameterComm Messengerfullmoon
PriceFreeFree
Rating5.0 (12 ratings) — better4.4 (100 ratings)
Positive reviews100.0% of reviews — better77.8% of reviews
Number of ratings12100 — better
Update frequencyEvery 5 days — betterEvery 10 days
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, Mac, Vision Pro — better
Requires iOS15.1 — better17.6
Further details — not scored
Size69 MB30 MB
Age rating4+17+
DeveloperHelio NetworksMainframe Computer, Inc.

Customer experience

Comm Messenger

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

fullmoon

All ratings100 ratings
Positive86.0%
Neutral3.0%
Negative11.0%
Written reviews81 reviews
Positive77.8%
Neutral4.9%
Negative17.3%

Bugs and requests

Comm Messenger

Not enough reviews yet to summarise bugs or requests.

fullmoon

Reported bugs

2 issues
  • Incompatibility with iPhone SE2 and iPad Pro Gen3 despite supporting Metal 3
  • Deepseek models not working on some devices

Requested features

6 requests
  • Add support for saving/copying full chat conversations
  • Expand functionality through Shortcuts integration
  • Provide more advanced language models
  • Allow users to remove/delete downloaded models
  • Add support for attaching files and images
Show 1 more
  • Implement voice mode and customizable AI models

In-app purchases

None

Comm Messenger

No in-app purchases

None

fullmoon

No in-app purchases

Questions

Is Comm Messenger free?
Comm Messenger is free to download, with no in-app purchases.
Is fullmoon free?
fullmoon is free to download, with no in-app purchases.
Which has better reviews, Comm Messenger or fullmoon?
Comm Messenger is rated higher. Comm Messenger averages 5.0 out of 5 from 12 ratings, while fullmoon averages 4.4 from 100 ratings.
Do Comm Messenger or fullmoon have ads?
Neither Comm Messenger nor fullmoon shows ads.
Which is updated more often, Comm Messenger or fullmoon?
Comm Messenger ships an update every 5 days, and fullmoon every 10 days. Most recently, Comm Messenger was updated on September 10, 2026 and fullmoon on August 11, 2026.

Other comparisons