Comm Messenger vs fullmoon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Decentralized keyserver hosting
- Nested chat threads
- Slack-style sidebars
- Community app library
- Calendar app integration
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- 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!
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.
- Private LLM chat
- Fully offline operation
- On-device model execution
- Cross-platform Apple support
- Customizable themes and fonts
- Shortcut integration
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Comm Messenger | fullmoon |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (12 ratings) — better | 4.4 (100 ratings) |
| Positive reviews | 100.0% of reviews — better | 77.8% of reviews |
| Number of ratings | 12 | 100 — better |
| Update frequency | Every 5 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 69 MB | 30 MB |
| Age rating | 4+ | 17+ |
| Developer | Helio Networks | Mainframe Computer, Inc. |
Customer experience
Comm Messenger
fullmoon
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
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- Implement voice mode and customizable AI models
In-app purchases
Comm Messenger
No in-app purchases
fullmoon
No in-app purchases









