AI texting assistants compared: keyboard vs. chatbot vs. app

There are now three distinct approaches to AI-assisted texting on iPhone. Each has a different philosophy about where AI should fit into your messaging workflow. Here's how they compare.

Approach 1: The chatbot (ChatGPT, Claude, Gemini)

Open a general-purpose AI chatbot, paste the message you received, ask it to write a reply, copy the result.

Pros: Powerful, flexible, handles complex messages well

Cons: 5-7 steps per reply, not optimized for casual messaging, no tone control, shares your conversation with a third party

Best for: Complex, important messages where you have time to think

Approach 2: The companion app

A standalone app designed specifically for message assistance. You paste in messages, choose settings, and get suggested replies — then copy them back.

Pros: More focused than general chatbots, may have tone controls

Cons: Still requires app-switching, still requires copy-paste, still not in the flow of conversation

Best for: People who don't mind the switching overhead

Approach 3: The AI keyboard extension (KOPY)

A custom iOS keyboard with AI built in. The AI lives inside your existing apps — no switching required.

Pros: Native keyboard integration, works in every app, no switching, reply inserts directly, mode/tone control

Cons: Requires initial setup (enabling keyboard + Full Access), limited to iOS, requires internet connection

Best for: High-volume messagers who reply across multiple apps throughout the day

The setup cost vs. per-reply cost tradeoff

The chatbot approach has zero setup cost but a high per-reply cost (many steps each time). The keyboard approach has a moderate setup cost (5 minutes to install and enable) but a very low per-reply cost (8-10 seconds each time).

If you're going to use AI to help with messaging more than a few times per week, the keyboard approach pays for itself in the first day. If you only need it occasionally for important messages, a chatbot is probably fine.

Privacy considerations

All three approaches send message content to external servers to generate AI replies. The difference is what happens afterward. General chatbots may use your conversations for training. KOPY does not store or log your messages.

Check the privacy policy of any AI texting tool before you use it with sensitive conversations.