Codename Jo vs Nautilo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Codename Jo
This voice assistant helps manage your inbox and calendar by summarizing emails, drafting replies, and scheduling events. It integrates with various work tools and can be controlled from your Apple Watch.
- Summarize emails
- Draft and send replies
- Organize messages
- Manage calendar events
- Integrate with work tools
- Apple Watch companion app
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Codename Jo is a voice assistant for your inbox, calendar and work tools. Talk to Jo to catch up on email, draft replies and manage your day. WORK THROUGH YOUR INBOX Hear summaries of your mail, ask follow-up questions, draft and send replies, and organize messages with archive and label actions. MANAGE YOUR CALENDAR Ask about your schedule and create or update events in Google Calendar. CONNECT YOUR WORK TOOLS Connect Gmail and Google Calendar, with optional connections for Slack, Notion, Granola, GitHub and custom MCP services. Available actions depend on the services you connect and their permissions. TALK FROM YOUR APPLE WATCH Use the Watch companion to start a conversation, mute your microphone or end a call. Keep your paired iPhone nearby with Codename Jo open. WHAT YOU NEED An OpenAI API key with access to the models used by Jo, a Google account for Gmail and Calendar, and an internet connection. OpenAI usage is billed separately to your OpenAI account. Microphone permission is required for voice conversations. Apple Watch is optional. YOUR DATA Your OpenAI key and connected-service credentials are stored in the device Keychain. Voice and relevant connected content are sent to the AI and service providers needed to fulfill your requests. Privacy Policy: https://kiloforge.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Nautilo
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THE WORLD WAS BUILT BEFORE AI Almost every app we rely on today was designed before agents ever existed. Messengers. Documents. Code editors. They treat AI like something you bolt on. And they bolt on a bland, faceless, lifeless assistant—if they allow it at all. Nautilo is one shared world built for people and AI working and playing together across your entire team. MEET YOUR GENIE A Genie isn't just some chatbot or a faceless, throwaway agent. They're friends. Secret keepers. The greatest assistant you've ever had. In Nautilo, Genies are super long-lived AI collaborators with their own identity, personality, and memory. They get to know you and your people over time, so every conversation builds on the last. YOUR SERVER, YOU CONTROL. Nautilo runs on your own server, which you control, so you can trust Nautilo with your work and your personal life. Your server is your trust boundary. It's not a SaaS where you don't know who's on your shared server, or who's looking in on the backend and reading all your files. It's only the people you know and trust and whom you invite into your world. ONE PLACE TO WORK TOGETHER You can work together with your Genies in the same chat rooms and personal threads. Work on the same docs and artifacts together. Research together. It is co-creation, not prompt-and-pray. You and your Genie work together on any artifacts in your world or your paired desktop. YOUR WORLD, IN YOUR POCKET Nautilo Mobile is one doorway into that shared world. Continue the conversations that matter in the same threads and chat rooms you work in every day, reach your files and Genie memories about you on the go, and stay connected to your people and Genies wherever you are. Connect to the Nautilo server your organization uses by address or QR code. A reachable server over HTTPS is required. Some Desktop, Web, administrative, paired-computer, and protected-content capabilities are not available in this Mobile release.
Screenshots
Verdict
The clearest difference is update cadence: Codename Jo at every 5 days against Nautilo's every 2 weeks. Nautilo's advantage is iOS requirement (16.4 vs 26.4). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Codename Jo ships an update every 5 days, Nautilo every 2 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Codename Jo | Nautilo |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 26.4 | 16.4 — better |
| Further details — not scored | ||
| Size | 110 MB | 60 MB |
| Age rating | 4+ | 17+ |
| Developer | Petaforge Inc. | Kentauros AI Inc. |
In-app purchases
Codename Jo
No in-app purchases
Nautilo
No in-app purchases









