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The Android dialer built for ADHD, autism & AuDHD brains — time-bound calls, focus sounds, ICE lock-screen card. 667+ patent applications filed.
Website, pricing, platforms and company facts side by side.
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| Website | stackgo.io | yapperphone.app |
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| Platforms | — | |
| Company | — | Startup from Finland · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of StackGo yet.
Yapper Phone replaces the standard Android dialer with the world's first Health Communications Technology (HCT) app — a phone built for ADHD, autism, and AuDHD brains, and for anyone who finds calls cognitively demanding. In the call: six call types via a scroll picker (Standard, Body Double,...
What each product offers, as listed by its team.


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Overall verdict
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As answered by people managing StackGo and Yapper Phone.
Yapper Phone's answer:
It's the only phone app that works inside the call itself. Every other dialer stops at the screen — Yapper adds time intelligence to the call: visible countdowns, pre-call duration negotiation where both sides agree on length before connecting, gentle time signals instead of hard cutoffs, and focus sounds mixed into call audio. It's a full Android system dialer replacement designed for ADHD, autism, and AuDHD brains, backed by 667+ USPTO provisional patent applications.
Yapper Phone's answer:
Caller-ID apps tell you who's calling; wellbeing apps limit your screen time. Neither helps during the call, which is where the cognitive load actually is. If phone calls drain you — time blindness, sensory overload, anxiety about how long a call will run — Yapper is built for exactly that, and it's the only actively developed Android-native dialer designed for neurodivergent users.
Yapper Phone's answer:
ADHD, autistic, and AuDHD adults, and anyone who finds phone calls cognitively demanding. Built with and for those communities — the founder has ADHD and Type 1 diabetes and designed every feature on his own brain first. Yapper Phone is not a medical device.
Yapper Phone's answer:
A Finnish solo founder with ADHD spent a year building the phone he needed and couldn't buy. Tried several AI coding tools and got a jumbled mess — then Anthropic's Claude made it possible. One person, no team, no investors: a shipping system dialer, 667+ patent applications filed February 27, 2026, and a permanent commitment of a substantial portion of profits to the Institute for The Study Of Humanity and Maximized Impact, a Finnish research association. No exit, ever.
Yapper Phone's answer:
Flutter and Kotlin on Android, with Firebase for backend services. Built with AI, runs without it — the shipped app is deterministic and works offline, with no AI in the call path.
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