Text Expander vs AI Rewrite Keyboard: What's the Difference

Both tools save time typing, and both live inside your iPhone keyboard, which is part of why they get confused for each other. They solve different problems, though, and knowing which one fits a given message will save more time than using either one badly.

What a text expander does

A text expander stores a fixed piece of text behind a short trigger. Type ";addr" and it becomes your mailing address. Type ";sig" and it becomes your full email signature. The text that comes out is exactly what you saved, every time, with no variation.

That's the whole feature, and it's a good one for information that never changes: an address, a phone number, a boilerplate disclaimer, a signature block. You write it once and never retype it.

What an AI rewrite keyboard does

An AI rewrite keyboard doesn't store fixed text. Instead, you write something in your own words, however rough, and it rewrites what you wrote to fit a tone or format you choose. The input is different every time, and so is the output.

You type: "cant make the call today something came up, sry"

Rewritten (Professional): "I'm unable to join today's call — something came up on my end. Apologies for the short notice."

Ask the same tool to rewrite a different draft and it produces a different result, because it's responding to what you actually wrote, not playing back a saved string.

The test: does the text change or not?

The simplest way to decide which tool fits is to ask whether the text should be identical every time or different every time.

• Your shipping address, a support email template with no variables, a standard sign-off — the words should never change. Use a text expander.
• A reply to a specific person about a specific situation, an apology, a follow-up, anything that needs to sound right for the moment — the words need to adapt. Use a rewrite keyboard.

Trying to force one tool to do the other's job usually shows up fast. A text expander snippet used for a reply reads as obviously copy-pasted because it is. A rewrite tool used for a fixed address is needless overhead for something that never needed rewriting in the first place.

The middle ground: reusable instructions instead of reusable text

There's a category between the two that's easy to miss: text that should follow a consistent pattern but still needs to adapt to content. A recurring status update, a customer response format, a specific voice you always want your writing to land in.

QKeyboard's custom writing modes cover this case. Instead of saving fixed text, you save a reusable instruction — how you want something rewritten — and apply it to whatever you type. The output changes every time because the input changes, but the pattern behind it stays consistent. It's the structure of a text expander with the adaptability of a rewrite tool.

Using both together

These tools aren't in competition. A text expander handles the parts of your typing that are genuinely fixed — contact details, standard disclaimers, addresses. An AI rewrite keyboard handles everything that needs to sound right for a specific reader in a specific moment. Most people who type a lot on their phone have use for both.

QKeyboard works as a custom iOS keyboard, so it sits inline in whatever app you're already typing in — Messages, Mail, Slack, or anywhere else — without switching apps. The free plan includes 20 AI rewrites a day, or 100 a day with your own API key, plus up to 5 active custom modes. Details are on the pricing page.