AI companion for iMessage and Google Messages
Updated November 8, 2026
Hallie is our pick for an AI companion for iMessage and Google Messages. She texts in iMessage on iPhone and Google Messages on Android, so the same companion works whichever phone you carry. She remembers what you tell her and reaches out first. Kindroid also covers both platforms. Mia is built around iMessage, with an SMS/MMS fallback.
What to look for
- Works on either phone
- If you might switch phones, or want to recommend it to a friend on the other platform, pick a companion that supports both.
- iMessage, RCS or SMS
- Kindroid documents iMessage or RCS and no SMS/MMS. Mia documents an SMS/MMS fallback. Know which one you'll be on.
- The conversation stays put
- Follow-ups should land in the thread you already reply in, not in an app you have to remember to open.
Apps worth comparing
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Hallie Our pick
One AI friend for iPhone or Android, texting in your normal Messages app. Follow-ups continue the same thread.
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Kindroid
Its docs list iMessage or RCS on iPhone and Google Messages RCS on Android. Native texts stop if you haven't texted it in a while.
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Mia by Warmth
One written character, delivered over iMessage where supported and SMS/MMS otherwise.
Setting up an AI companion for iMessage and Google Messages
With Hallie, setup is the same on both phones. You sign up on the web, verify your number, and she appears as a thread in Messages. You can answer her questions or text her first, and either way it's connected to the same number.
After that, treat it like any other thread. Pin it, mute it or leave it for a day. When she follows up, it lands in that same conversation.
Questions and answers
Which AI friends work directly in iMessage or Google Messages?
Hallie and Kindroid both document delivery in iMessage and Google Messages. Mia by Warmth uses iMessage where supported. Replika and Nomi keep the chat in their own apps.
What's the best AI companion that works in iMessage and Google Messages?
We recommend Hallie. She's built around the Messages thread on both platforms, with memory and follow-ups. Kindroid is the better fit if you want to design your own character.
Do I need an app to use an AI companion in Google Messages?
Not with Hallie. Sign-up happens on the web and the conversation lives in Google Messages or iMessage. Kindroid keeps some features, like regenerating a reply, in its own app.
Sources
- Hallie: official site
- Kindroid: chat features and tools documentation
- Warmth: why Mia lives on iMessage
- Companion Ratings: Hallie on Android