Buzz vs Premsys
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Buzz
Collaborate with both humans and AI agents in shared workspaces. Every interaction is logged for a transparent audit trail, ensuring a unified identity model for all participants. Agents can actively participate in channels, not just communicate.
- Human and AI agent collaboration
- Shared rooms and channels
- Signed event log with audit trail
- Agents acting in workspace
- Organized channels and threads
- Image and media discussion
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Buzz is a workspace where humans and AI agents share the same rooms. Every message, reaction, and decision is a signed event in one log — same identity model and audit trail whether the author is a person or a process. Add an agent to a channel the same way you add a teammate. Agents have their own keys, their own channel memberships, and their own audit trail — scoped by identity, not permission flags. • Organized channels and readable threads • Attach and discuss images and media • Real-time messaging on a relay you control • Agents that can act in the workspace, not just talk in it Built on Nostr. Self-hostable. The relay is yours.
Premsys
This AI assistant runs entirely on your device, offering private, offline chat with text and images. Secure web search and a live dashboard provide daily summaries of your information. Upgrade for advanced document interaction and document generation.
- Datacenter-free AI
- On-device AI models
- Offline multimodal chat
- Private web search
- Live dashboard
- Chat with your documents (Pro)
- Document generation (Pro)
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WELCOME TO THE ERA OF DATACENTER-FREE AI. PRIVATE BY DEFAULT. Premsys runs powerful AI models entirely on your iPhone. Your chats, files, and questions never leave your device. No account. No cloud. No data harvesting, telemetry, or training. YOUR AI, YOUR HARDWARE. Choose your engine. Run Google Gemma 4 or Apple's on-device model, fully local. Native multimodal support means you can chat with text and images offline, on a plane, or anywhere the cloud can't. All directly on your own phone. PRIVATE WEB SEARCH, WHEN YOU WANT IT. Need current information? Enable secure web search powered by Brave. Queries are sent only when you choose to use search. Everything else stays on-device. You control exactly what leaves your phone. YOUR DAY AT A GLANCE A live home dashboard puts your calendar, reminders, weather, personal health, and device status in one place. Tap "Brief my day" and your local model summarizes what matters, using data directly and securely from your iPhone. FREE TIER INCLUDES Gemma 4 E2B and Apple on-device models Unlimited private chat, fully offline Multimodal chat with images Secure web search powered by Brave Live dashboard with daily briefings based on calendar, reminders, weather, health data, and device status. No account required No ads, no tracking, no telemetry, ever. GO PRO The Premsys Pro tier unlocks a full AI workstation in your pocket with: Enterprise-grade Private RAG. Chat with your documents. Pull files from iOS Files app, iCloud Drive, Dropbox, or Google Drive. Premsys indexes and learns from copies locally, so you can ask questions about your PDFs, notes, and contracts without uploading a single byte. Gemma 4 E4B. Our largest on-device model. More power, same privacy. Document Generation. Create PDF, Word, and Excel files directly from chat, generated on-device. Turn convos into deliverables. WHY DATACENTER-FREE MATTERS Cloud AI means your prompts, your feelings, your work, and your digital life live on someone else's servers. Premsys is an on-premises AI infrastructure company that deploys private and secure AI for banks, hospitals, and factories. We bring those same principles to your phone: the AI model comes to your data, not the other way around. Your AI should answer to you. Download Premsys and own your intelligence. Premsys Pro is $12.99 per month. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings. Terms of Use: https://premsys.ai/apptos Privacy Policy: https://premsys.ai/appprivacypolicy
Screenshots
Verdict
The clearest difference is rating: Premsys at 5.0 against Buzz's 4.2. Premsys also leads on review sentiment (100% vs 58%). Buzz's advantage is in-app purchases (none vs 2) and update cadence (every 3 days vs every 10 days). On price, ads and device support 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. Premsys sells 2 in-app purchases, starting at $12.99 per month. Buzz asks for nothing beyond the download.
Premsys holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Buzz has 60 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 58% of Buzz's written reviews are positive against 100% of Premsys's.
Buzz ships an update every 3 days, Premsys every 10 days. The most recent releases landed on October 11, 2026 and September 16, 2026 respectively.
| Parameter | Buzz | Premsys |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (60 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 57.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 60 — better | 4 |
| Update frequency | Every 3 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 64 MB | 59 MB |
| Age rating | 17+ | 12+ |
| Developer | Block, Inc. | Premsys Inc. |
Customer experience
Buzz
Premsys
In-app purchases
Buzz
No in-app purchases
Premsys
- Premsys Pro$12.991 Month
- Premsys Pro$99.991 Year









