Free to use; extras unlock with a one-time purchase. A barograph on your wrist. The face is a chart of the last hours of air pressure, drawn like the paper of a barograph drum, so you read where the weather is heading from the shape of the line. The Instinct's round window shows the pressure now and its change over three hours, and turns into a storm warning when the pressure falls fast. Made for the Instinct 2, 2S, 2X, 3 Solar and E (40/45 mm) and the Descent G1, and also on round fenix, Enduro, tactix, quatix, Forerunner, MARQ, Descent Mk2 and vivoactive watches with a memory-in-pixel screen, where the trend sits under the chart. - The chart: the last 12 hours by default (6 or 24 in the settings), with dotted lines at the clock hours and the scale written at its edges. It scales itself to the day's range, so a 2 hPa drift shows as clearly as a front. - The trend: the current value and the change over three hours, with an arrow. - Storm alert: when the pressure has fallen 3.6 hPa or more in three hours, a storm cloud and the change in a black badge, while the chart shows pressure (you can turn it off). - The time, the date, battery, phone and unread notifications, and two slots (heart rate and steps by default). Customize it in the Connect IQ app. The chart span, the round window (the trend or one value), the storm alert and white on black (instead of black on white) are free to set. The chart's series and the two slots (marked with a star in the settings) can be changed during a 7-day trial, and stay unlocked for good with a one-time purchase ($3.99) at murmurgram.gumroad.com/l/barogram: enter the 12-character Watch face ID from the settings at checkout, and type the key you receive by email into Unlock key. After the trial the chart shows pressure and the slots return to their defaults until unlocked. The chart can trace pressure, altitude, wrist temperature, heart rate, Body Battery, stress or blood oxygen. Slots can show any of those, or steps, calories, distance, sunrise, sunset, weather temperature, resting heart rate, recovery time, Intensity Minutes or ascent today. - Time font: six more styles for the time besides Plex Mono: condensed, dot matrix, segment, stencil, outline and geometric. The chart reads the history your watch already records; how many hours it keeps depends on the watch. Pressure is in hPa. Blood oxygen shows only when Pulse Ox is on; Body Battery, stress and blood oxygen are not recorded by every watch (fenix 5 Plus, Forerunner 645 Music, vivoactive 3 Music), and there the chart says NO DATA. After you change the chart, it can take a few minutes to fill. Privacy: everything is computed on the watch. Nothing is sent anywhere. If you buy the unlock, Gumroad handles the payment and your email address is used only to send your key and for support. Permissions are used for sensor history (the chart and the slots), user profile (resting heart rate), and position (sunrise and sunset). Time digits use IBM Plex Mono (Copyright 2017 IBM Corp., SIL Open Font License 1.1).

The unlock link now has its own line in the settings (Unlock at), so the whole address shows.