Comparison

Codename Jo vs Nautilo

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

Head to head
About

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.

Highlights
  • Summarize emails
  • Draft and send replies
  • Organize messages
  • Manage calendar events
  • Integrate with work tools
  • Apple Watch companion app
Features
Read full description

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/

About

Nautilo

Read full description

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

Codename Jo4 screens
Nautilo4 screens

Verdict

The call

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

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

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.

Scorecard2 real differences · 8 level
Codename Jo versus Nautilo: the parameters behind the verdict, then further details
ParameterCodename JoNautilo
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS26.416.4 — better
Further details — not scored
Size110 MB60 MB
Age rating4+17+
DeveloperPetaforge Inc.Kentauros AI Inc.

In-app purchases

None

Codename Jo

No in-app purchases

None

Nautilo

No in-app purchases

Questions

Is Codename Jo free?
Codename Jo is free to download, with no in-app purchases.
Is Nautilo free?
Nautilo is free to download, with no in-app purchases.
Do Codename Jo or Nautilo have ads?
Neither Codename Jo nor Nautilo shows ads.
Which is updated more often, Codename Jo or Nautilo?
Codename Jo ships an update every 5 days, and Nautilo every 2 weeks. Most recently, Codename Jo was updated on November 6, 2026 and Nautilo on October 31, 2026.

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