Daily steps. Last recorded heart rate. Your third metric.

03 — Free to try. One-time Pro.

Free and Pro

Horef Rings is free to download. Free forever: date, day of week, local time, Watch and iPhone battery, steps and Activity arcs.

Horef Rings Pro unlocks all 75 metrics — weather, calendar, heart rate, sleep, Headroom and health trends — and the iPhone widgets, on your iPhone and paired Apple Watch.

• 14-day trial — free. Nothing is charged and it does not renew; it can be used once. When it ends, Pro metrics show a lock and the basic metrics keep working.
• Pro — a one-time purchase, not a subscription. The App Store shows the price in your currency. Family Sharing is supported.
• Restore purchases — open Horef Rings on iPhone → Horef Rings Pro → Restore purchases.
• Bought the earlier paid version of Horef Rings? Pro is already yours.

04 — New in 1.0.1

Headroom: how much you have in reserve this morning

Headroom is a daily score from 0 to 10. Horef Rings calculates it on your iPhone and Apple Watch from your Health data and shows it in any circle, complication or widget — as a dial of ten segments with the score in the middle, coloured by level (Rest, Easy, Steady, Push), or as one ring.

It is Horef Rings’ own estimate. It works on every Apple Watch, including models without Apple’s Readiness score, and its method is published below. It is a wellness estimate, not a medical measurement. If you feel unwell, talk to a doctor — don’t base medical decisions on it.

Three parts, compared with your own norm

• Recovery — 45%. Starts at 80% and moves with last night’s vitals against your norm, the median of your previous 28 days. Ordinary night-to-night variation counts as the norm: HRV within ±10%, resting heart rate within ±2 bpm, breathing within ±1 breath per minute, sleeping wrist temperature within ±0.5 °C. Beyond that, heart rate variability (HRV) and resting heart rate count both ways alike — better than usual raises recovery as much as worse lowers it; faster breathing and a wrist-temperature shift only lower it. HRV and breathing use readings recorded from midnight to 10:00; resting heart rate is Apple’s full-day value from the day before.
• Sleep — 35%. Last night’s sleep against your sleep need (7.5 hours by default). Only the night counts: sleep that ends after noon, such as an afternoon nap, does not replace it.
• Load — 20%. Your active energy over the last 3 days against your 4-week average. Up to 10% above usual counts as fresh; a much heavier recent block lowers it.

What the score means

• 7 — Steady is a normal day: vitals at your norm, enough sleep, usual load.
• 8–10 — Push needs overnight vitals better than your norm, with good sleep.
• 5–7 — Steady, 2–4 — Easy, 0–1 — Rest: shorter sleep or vitals worse than your norm lower the score in proportion.

History and how each day was scored

• Above the three circles in the iPhone app, the last 7 days appear as small dials. Tap a day, the calendar or History.
• Week or month, back to your first Health records: daily scores as bars and a month calendar coloured by score. Tap any day to see what moved it — each vital’s change against your norm and its effect in points.
• Charts of overnight HRV and resting heart rate against your norm, sleep against your sleep need and active energy against your 4-week average.
• Sleep need — set it in Headroom → History → Sleep → Sleep need, from 5 to 10 hours in 15-minute steps; 7.5 hours by default. The score, its history and the Sleep week award use it.
• History is recalculated from Health on your iPhone, using only what was recorded by each morning, so it is available from the first day.

Awards

• Medals earned from your history: Getting started; Steady streaks of 3, 7, 14 and 30 days; Push day and Push streak; Perfect 10; Sleep week; Recovery week; Steady month; Comeback; Best week.
• Each medal shows how many times you earned it and when; medals you have not earned yet show your progress.
• When you earn a medal, a notification with it arrives on your iPhone — and on Apple Watch while the iPhone is locked. Tap it to open the medal.

Privacy and limits

• Everything is calculated on your devices; Headroom and its history are never sent to Horef Labs. The iPhone shares the day’s score with your paired Apple Watch directly.
• Apple Watch keeps only about a week of Health history, so it shows the iPhone’s score while that score is fresh.
• A night without recorded sleep: the score uses recovery and load only, is marked in the history and does not count for awards.
• During the first weeks the score is approximate while your norm builds up.
• Headroom is part of Horef Rings Pro and the 14-day trial.

In the press: Indie App Spotlight: how Headroom is calculated, with a worked example — the5krunner

05 — Also new in 1.0.1

Activity arcs, settings, app design and iPhone Duo

• Activity arcs. Move, Exercise and Stand appear as three open arcs in Horef Labs colours — Signal Blue, Cyan and Sand — with your Health goals and the Move percentage below them.
• Design. Choose the app’s look in Horef Rings → Settings → Appearance → Design: Standard; Terminal — green monospaced text on black with prompt-style titles and Unicode box frames (┌─┐) around sections; or Horef Labs — brand colours, light and dark. The Apple Watch app follows the iPhone. Widgets and complications keep their own colours.
• Settings. Appearance, language, presets, data and access, iPhone Lock Screen widgets and Help have their own page — the gear on the main screen.
• Language. The app follows your iPhone language (English, Russian, German, French or Japanese; otherwise English). Choose another in Settings → Language.
• Illustrated help. Settings → Help explains each screen with screenshots and shows every award with what it takes to earn it.
• Battery dial. Watch and iPhone battery appear as an open dial, like weather.
• iPhone Duo. The iPhone app runs full screen on both displays.

06 — New in 1.0.2

Any metric on any watch face

• One-metric complications. Besides the three-circle field, any metric can be its own complication on any Apple Watch face — circular, corner, inline or rectangular. In the face editor choose Horef Rings: Left, Centre and Right show the metric in that Watch circle (any of the 75), plus twelve metrics you choose in Horef Rings on iPhone → Settings → Watch complications (Headroom first unless changed).
• Corners like watchOS. A corner shows the value in the corner and a curved scale along the bezel: today’s low–high for weather, battery level, Headroom 0–10, Move or a goal; other metrics get their name as curved text.
• Ready-made iPhone widgets. Weather, Headroom, Sleep, Activity arcs and the Watch and iPhone batteries are listed separately in the widget gallery for the Lock Screen and Home Screen.
• Battery read live. The Watch and the iPhone read their own battery when a widget updates, with a bolt while charging.

07 — New in 1.0.3

Headroom, widget pages and battery time left

• Readiness is now Headroom. The daily 0–10 score has a new name, so it is not confused with Apple’s Readiness score, and new level names: Rest, Easy, Steady and Push. The calculation, your history and the medals you earned stay the same; the medals follow the new names, such as Steady streak, Push day and Steady month.
• Widgets open their page. Tapping an iPhone widget opens its page in Horef Rings; the Open button on the page opens Apple Weather, Calendar, Health or Fitness.
• Each metric’s own forecast. Weather pages show the next 24 hours and 7 days of that metric: temperature with rain and wind, or humidity, UV index (with the day’s maximum), wind and gusts, cloud cover, air pressure, dew point, visibility or feels like. Sunrise and sunset pages list each day’s sunrise and sunset; the moon page lists its phases.
• Upcoming events. Calendar, date and month widgets list your upcoming events by day.
• Last 7 days. Every Health metric shows its own last 7 days: day totals for counts (steps, distance, exercise, flights climbed, water…) and day averages for measurements (heart rate, blood oxygen, breathing rate, wrist temperature, weight, VO₂ max…). Sleep shows the last 7 nights; Headroom its last 7 days with level and average.
• On Apple Watch. A one-metric complication opens the same page for its metric, and the month complication opens your upcoming events. The Watch pages show the forecast, events, battery and the last 7 days too.
• Battery time left. The Watch and iPhone battery pages show how long the battery lasts at the current pace, with the current and the usual pace. Optionally, turn on the alert in Settings → Battery: a device tells you when it drains at least 1.5 times faster than usual and would last less than 6 hours — at most once between charges.

75 metrics, three places.

Some metrics need records from compatible devices or other Health apps. Empty results can mean no records or no permission. Horef Rings is a display utility, not a medical device.

Support for Horef Rings

Help & setup

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