[ryanbr]

Release prep for v8.5.0 — the changelog + version bumps for everything merged since v8.4.0.

Files

• docs/releases/v8.5.0.md — full release notes (Added / Fixed / Performance / Diagnostics & honesty) + the whatsnew frontmatter.
• android/app/build.gradle.kts — versionCode 267 → 268, versionName "8.4.0" → "8.5.0".
• project.yml — MARKETING_VERSION "8.4.0" → "8.5.0", CURRENT_PROJECT_VERSION "178" → "179".
• In-app "What's New" — AppChangelog.swift + AppChangelog.kt get a parallel 8.5.0 entry, and currentVersion/CURRENT_VERSION bump.

What's in 8.5.0 (highlights)

• Added: raw SpO₂ on Health (WHOOP 4.0, Future of Noop ? #93); Fitness Age countdown (Fitness Age: "N more nights" countdown while it's building (iOS + Android) #81).
• Fixed: skin temp °F in Deep Timeline (Skin temp metric not syncing with Fahrenheit #101); Effort ring honours the 0–100/WHOOP-0–21 scale (The Effort scale setting doesn't seem to be applied to the Today screen. (UI) #45); workout-in-progress card back on Home (Workout-in-progress card no longer appears on Home after Liquid Design update #105); Apple Health steps count (Steps not being counted after the update #89); clearer overnight-HRV copy ([hrv] HRV & Autonomie - activated nights only doesn't track naps during the day #92); battery-alert-while-charging ("Charge Strap" notification when strap battery is low, even if the strap is charging #80) + battery estimate (Battery time remainder estimate #99) + widget freshness (Data inaccuracy on the iOS widget #114); motion "g" (Motion metric makes no sense #102), skin-temp banding (Skin temp reads inaccurately in Fahrenheit #111), MG steps empty-state (Steps analytics screen opens but shows no analytics after imports #107), hero label wrap (Today hero: keep ring labels/pills on one line (oversized card, #74) #78), Appearance dividers (Padding between the option in settings in the appearance card #79).
• Performance: import RAM budget (perf: bound import RAM with a per-import total-byte budget #70/Android import: bound peak RAM with a per-import total-byte budget (#70 parity) #125); Sleep-screen memoize (Sleep: memoize SleepConsistencyCard per-night fold (perf) #128); Today formatter hoists (Perf: hoist per-render DateFormatters to static #129).
• Diagnostics: Oura anchor-rejection logging ([Oura Ring] - anchor not working and missing messages such as 0x42, sleepTime ... #91); Test Centre sleep capture-check ([sleep] Sleep & Rest #127).

Notes

• Version is consistent across all five surfaces (8.5.0 / code 268 / build 179 / both in-app changelogs).
• :app:compileFullDebugKotlin passes (validates the Kotlin AppChangelog entry + the bump); iOS project.yml/AppChangelog.swift ride the release build.
• No @handle credits in the notes (per the release convention).
• After merge: refresh testing-latest / dispatch the Release build.