On-device AI (Apple Foundation Models)
How Cairn analyzes mood, energy and themes entirely on your iPhone using Apple's Foundation Models — no entries ever leave the device for analysis.
What runs on the phone
Transcription, mood and energy, keywords and the short insight line are produced by Apple's Foundation Models on your iPhone. No account, no network, no cost per entry — and it keeps working in a tunnel.
What it is good at
Everything that touches a single entry. Reading one recording and saying what mood it carries is exactly the size of problem an on-device model handles well.
Where it stops
Long-horizon work — a whole month synthesised into prose, or a question answered across a year of entries — is heavier than a phone model does well. That is where the optional cloud paths come in, and why they exist at all.