Measurements, mistakes and decisions from building AI that runs on the phone.https://offai.app/https://offai.app/blog/what-actually-leaves-your-phone/https://offai.app/blog/what-actually-leaves-your-phone/Everyone in this category says "private". Here is the complete list of network calls our apps make, why the list is short, and how you can check it yourself without trusting us.Thu, 13 Aug 2026 00:00:00 GMThttps://offai.app/blog/we-got-the-same-licence-wrong-twice/https://offai.app/blog/we-got-the-same-licence-wrong-twice/A model licence flipped from right to wrong to right again across three months. The fix was not being more careful — it was a test that refuses to let the value be set without evidence.Tue, 11 Aug 2026 00:00:00 GMThttps://offai.app/blog/the-npu-wins-prefill-not-decode/https://offai.app/blog/the-npu-wins-prefill-not-decode/We benchmarked a phone NPU against its own CPU and found the marketing number is the half that matters least. What actually limits on-device AI is memory bandwidth.Tue, 04 Aug 2026 00:00:00 GMT