Every SolGlow release, in one place.

A focused stability release for the Live Activity and the Apple Watch.

• FixLive Session accuracy. Fixed the vitamin D figure freezing on the Dynamic Island and Lock Screen, and a case where a live session wasn't being recorded to history.
• FixApple Watch stability. Resolved a watchOS connectivity watchdog crash by moving received-context reads off the main thread.

SolGlow grew from measuring the sun to helping you use it — with a focus on morning light and how your body actually puts vitamin D to work.

• ProMorning Light. A new dashboard card showing your first daylight of the day and how soon after waking it landed, plus a gentle morning reminder. Reads your wake time from Apple Health Sleep Analysis.
• ProCofactor support. Log magnesium, K2, B12, and omega-3 and SolGlow shows a Low / Adequate / Optimized bioavailability badge — because vitamin D needs help to work.
• ProLife-stage targets. Pick your stage — child, pregnant, 75+, or prediabetes — and your daily target and guidance adjust to the latest Endocrine Society groupings.
• ProEditable history. Fix a day's recorded sunlight minutes from History → Day Detail, and the day's vitamin D, calendar, serum projection, and doctor report all re-compute.
• ProApple Watch Smart Stack. A new watchOS widget and face complications showing today's IU against your goal and your serum estimate.
• FreeA canonical UV source. SolGlow now writes the day's peak UV index to Apple Health, so your device's UV data comes from an app that actually models it.

A deeper Pro tier and a richer live experience while you're out in the sun.

• NewSun-session Live Activity. Track an active sun session live on the Lock Screen and Dynamic Island as your vitamin D ticks up.
• ProExpanded Pro features. Additional dashboard depth and tracking tools landed behind the SolGlow Pro unlock.
• FreePricing settled. SolGlow Pro moved to a one-time $7.99 lifetime unlock — still no subscription, ever.

SolGlow became free to try, and gained its companion-app connection.

• NewFree to try. SolGlow moved to a free download with a 14-day full-feature preview, then a one-time unlock — full dashboard, forecast, watch app, and widget, nothing held back during the preview.
• NewCalmTide companion sync. If you also use CalmTide, the two apps now share a small daily summary on-device so each can show a fuller picture of your sun, sleep, and recovery.
• FreePer-day clothing in History. Adjust what you were actually wearing on any past day and your vitamin D and burn estimates re-compute to match.
• PolishSmarter widget & background refresh. Faster, more accurate widget snapshots and a new coordinator that keeps the dashboard, widget, and watch in sync after you've been outside.

The first release — turning the sun into a measurable nutrient.

• NewVitamin D from real sunlight. Estimates the vitamin D you produced today from your Apple Watch's Time in Daylight, your location's solar geometry, the day's UV, and your skin profile — in real IU, not just minutes outside.
• NewSunburn guardian. Conservative, skin-type-aware burn warnings that fire when peak UV plus your time outside approaches your threshold.
• NewEvery source in one place. Log foods (USDA FoodData Central), supplements, and dietary intake, and see a projected serum level alongside today's exposure.
• NewApple Watch app & Home Screen widget. A glanceable summary of today's sunlight, vitamin D, and burn status.
• FreePrivate by design. No accounts, no analytics, no ads. Everything stays on your device — the only network call is an anonymous UV-forecast lookup.