diff --git a/profile/README.md b/profile/README.md
index 961a81e..d31ff9e 100644
--- a/profile/README.md
+++ b/profile/README.md
@@ -7,6 +7,11 @@ dark. OpenStrap is what I built so a 4.0 band that would otherwise sit in a draw
 doing something: read your own data off it over Bluetooth, keep the raw bytes, and turn
 them into the numbers you actually look at.
 
+**Everything runs on your phone.** The band talks to the app over Bluetooth, the app
+decodes the bytes, computes the metrics, and stores the results locally. There's no
+account, no cloud, and no server that ever sees your raw data. That isn't a privacy
+setting you switch on — it's the architecture.
+
 Is it a replacement for WHOOP? No, and I'm not going to pretend it is. They've got years
 of research and a whole team; this is one person and textbook methods. But it's a real
 second life for hardware you already own, and your data stays yours.
@@ -14,18 +19,26 @@ second life for hardware you already own, and your data stays yours.
 Tested on WHOOP 4.0 only. Once you start using it, don't reconnect the band to the
 official WHOOP app — a firmware update could change or break the events this relies on.
 
+### Get the app
+
+- **iOS** — [join the TestFlight beta →](https://testflight.apple.com/join/2BVSwq65)
+- **Android** — [download the APK →](https://github.com/OpenStrap/edge/releases/latest)
+
 ### The pieces
 
-- **[edge](https://github.com/OpenStrap/edge)** — the phone app. Connects to the band,
-  drains it, shows your day. [Download the APK →](https://github.com/OpenStrap/edge/releases)
-- **[backend](https://github.com/OpenStrap/backend)** — the server. Ingests raw frames
-  and computes everything. One Cloudflare Worker; self-host it or use mine.
-- **[analytics](https://github.com/OpenStrap/analytics)** — the math. Published methods
-  (Banister TRIMP, Cole-Kripke, and friends) turn heart rate and motion into metrics.
+- **[edge](https://github.com/OpenStrap/edge)** — the phone app, and where everything
+  actually happens: Bluetooth, local storage, the compute pipeline, every screen.
 - **[protocol](https://github.com/OpenStrap/protocol)** — the decoders. Raw WHOOP 4.0
-  record bytes into named fields.
-- **[research](https://github.com/OpenStrap/research)** — the protocol reference, plus a
-  client to talk to a band yourself.
+  record bytes into named fields. Pure Dart, zero dependencies, runs on-device.
+- **[analytics](https://github.com/OpenStrap/analytics)** — the math. Published,
+  peer-reviewed methods (Banister TRIMP, Cole-Kripke, Lomb-Scargle and friends) turn heart
+  rate and motion into metrics — each carrying its own confidence and tier, and returning
+  nothing rather than guessing when the data isn't there.
+- **[research](https://github.com/OpenStrap/research)** — the lab notebook. The protocol
+  written down, plus a one-file Python client so you can talk to a band from a terminal.
+- **[backend](https://github.com/OpenStrap/backend)** — *optional, and not required.* A
+  small self-hostable companion for importing an old cloud account and for opt-in
+  telemetry. The app doesn't need it and doesn't use it by default.
 
 ### A few honest notes
 
@@ -34,4 +47,16 @@ the protocol — the events especially — is empirical guesswork, and no one pe
 confirm it to 100%. The more people poke at it, the closer we get to nailing every field
 down with real confidence.
 
-Not affiliated with, endorsed by, or connected to WHOOP. MIT licensed.
+The metrics are approximations built from published research, not medical-grade
+measurements. Nothing here is a diagnosis.
+
+### Support the work
+
+This is free, MIT-licensed, and has nothing behind it. If it gave your band a second life
+and you want to chip in:
+
+- **BTC** — `bc1qvtcch38dcwp967ar764uu6eetw7tf907844wfq`
+- **EVM** (ETH / Base / Arbitrum / Polygon) — `0x8310C89393366b7eBCD47ABa82e1dfB5ECeFFbD9`
+
+Not affiliated with, endorsed by, or connected to WHOOP. "WHOOP" is their trademark, used
+only to say which device this talks to. MIT licensed.