Inside Tacit, an AAC App Built Around a Two-Tap Rule
A while ago, on a bus, I watched a man try to tell the conductor where he needed to go. He pointed. He gestured. The conductor got impatient, the people behind him got impatient, and the man got smaller and smaller in his seat.
I leaned over to help, and that's when I realised he couldn't speak. He understood everything happening around him. What he didn't have was a fast way to be heard.
That moment turned into Tacit, an iOS app for people who can't rely on speech. You tap or type what you want to say, then either show it full-screen to the person in front of you or let the phone speak it aloud. It went live on the App Store on 29 September 2026, built solo for RevenueCat's Shipaton.
This is the full story: the problem, the product decisions, the architecture, the bugs that cost...
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