Shiver turns cold showers into a graduated challenge instead of a dare. Pick a plan — starting with the free 14-Day Starter — and Shiver runs a big, hands-free timer through each phase of your shower, cueing every change with haptics and a chime so you never have to open your eyes or step out of the spray. Log how each session felt, watch your streak grow, earn badges, and unlock five more plans, full stats, CSV export, and Apple Health sync with Shiver Pro. Everything you log stays on your iPhone.
Subscriptions are managed by Apple, not by us. Open iOS Settings → [your name] → Subscriptions → Shiver and tap Cancel. You keep Shiver Pro until the end of the period you already paid for. If you're using an eligible free trial, cancel at least 24 hours before it ends or it converts to a paid subscription automatically. Refund requests also go through Apple — we cannot issue them.
Open the paywall and tap Restore purchases. Make sure you're signed in with the same Apple ID you purchased with, and that you have a working internet connection. If it still doesn't appear, email us with the date of purchase and we'll help.
Free forever: the 14-Day Starter challenge, the in-shower timer with one saved preset, optional lead-in and record-only overtime, your session log and past-session deletion, daily streaks, weekly rhythm and Rest Mode, a calendar heatmap, free manual backup and restore, one daily reminder, and all safety and science content. All eighteen badges are visible; fifteen can be earned with free features and three require a Pro feature. Shiver Pro adds the other five plans (30-Day Full Cold, Contrast Protocol, 11-Minute Week, 90-Day Ice Ladder, The Reset), silent breathing prep, full stats, retro-logging, CSV export, unlimited presets, separate optional Apple Health writes and recovery reads, and foreground on-device voice commands where available.
For a free restorable backup, open Settings → Backup & restore and choose Save to Files or share or Email backup. The manual JSON file includes sessions, notes, moods, presets, plan progress and selected settings, but no purchases or Apple Health readings. It is plaintext: share it only with a destination you trust. To restore, choose a backup file, review the preview and confirm replacement of your current data. For a spreadsheet export, use Export CSV in your log (Shiver Pro). Files only leave your device when you deliberately choose a Mail, Files or share destination; Shiver has no backup server.
Check that notifications are enabled for Shiver in iOS Settings → Notifications → Shiver, and that the daily reminder is turned on inside Shiver's settings. Shiver schedules one repeating daily reminder on your device. Rest Mode pauses that reminder; ending Rest Mode restores your saved reminder choice and time. Turning the reminder off and on again re-schedules it.
Yes — optionally, with two separate Pro controls in Settings. Save mindful minutes writes completed sessions to Apple Health. In version 1.5.0, Recovery-aware plan nudge separately reads your recent HRV and resting heart rate history to offer a nonmedical suggestion; it never changes your plan automatically. Both controls are off by default and require their own Apple Health permission. Turning one on does not turn on the other. Raw Health readings are not stored in your backup or sent to us. You can turn either control off and manage permissions or delete written entries in Apple Health. Rest Mode pauses the recovery suggestion.
No. Shiver does not show ads and contains no advertising SDK.
To remove one past session, open its ellipsis menu in the log and confirm Delete. This updates your log, derived stats, streaks and badges; independent plan progress and existing Apple Health entries are retained. For all app data, use Clear all data in Settings or delete the app. Copies of backups or CSV files you already saved or shared are not deleted by Shiver; remove those separately from their destinations.
No. Shiver is a general wellness and habit-timer tool, not a medical device. It includes safety information about the cold-shock response and conditions worth checking with a doctor about first, but that is guidance about when to be cautious, not medical advice, diagnosis, or treatment. Talk to a qualified healthcare professional about whether cold exposure is appropriate for you. See our Terms of Service.
Email bogdan.tsiganiyk@gmail.com. Your iOS version, device model, and what you were doing when it happened all help.