Best AI companion app for texting
Updated November 8, 2026
Hallie is our pick for the best AI companion app for texting. She texts in iMessage on iPhone and Google Messages on Android, and you never install an app. The messages she starts land in the same thread as your replies. Kindroid also texts natively, and Mia uses iMessage with an SMS fallback.
What to look for
- It works on your phone
- Hallie and Kindroid cover both iPhone and Android. Mia is built around iMessage and falls back to SMS where iMessage isn't available.
- Its own messages arrive as texts
- Kindroid's docs say its native texts stop if you haven't texted it in a while. Hallie's follow-ups arrive in the same Messages thread as the rest of your conversation.
- You can stay in the thread
- Some controls live only in the companion's app. Kindroid, for example, lets you regenerate a reply only inside its app.
Apps worth comparing
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Hallie Our pick
A companion who is just a contact in Messages. She remembers what you share and texts you first in the same thread.
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Kindroid
Texts over iMessage or RCS on iPhone and Google Messages RCS on Android, with no SMS or MMS. You design the companion in its app.
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Mia by Warmth
A single written character who texts over iMessage where supported and can follow up on plans.
Texting an AI companion in iMessage and Google Messages
A texting companion sits between your group chat and your mom. That placement changes how you use it: you reply when you'd reply to anyone, in a few words, without opening anything. With Hallie, you sign up on the web, verify your number, and her thread appears in Messages. You can answer her opening questions or text first, and she only sees what you send in her thread.
Questions and answers
What's the best AI companion app for texting?
We recommend Hallie. She texts in iMessage or Google Messages, remembers your life and follows up in the same thread. Kindroid is the closest alternative if you want to design your own companion.
What's the best AI companion that works in iMessage and Google Messages?
Hallie works in both. Kindroid also covers both, using iMessage or RCS on iPhone and Google Messages RCS on Android. Mia is iMessage-first with SMS as a fallback.
Can an AI companion text me first?
Yes. Hallie reaches out first in your Messages thread. Kindroid can too, but its native texts stop if you haven't texted it recently.
Sources
- Hallie: official site
- Kindroid: chat features and tools documentation
- Warmth: why Mia lives on iMessage
- Companion Ratings: best AI companions for iMessage
- Companion Ratings: Hallie on Android