Shiver / Cold-shower habit
A cold finish.
At your own pace.
Shiver is for an ordinary shower, not an ice bath. Start warm, follow a gradual cold finish, and let a large timer, haptics, and chimes mark each change. Rest days belong in the routine, too.
For iPhone · Shiver Pro is an optional auto-renewing subscription. Manage or cancel it in your App Store account settings at least 24 hours before renewal.
Getting started
One step at a time.
Begin with the starter plan
The free 14-Day Starter grows a cold finish from 15 to 90 seconds over two weeks. Read the safety guidance before deciding whether to begin.
Let the timer guide the phases
Choose a get-ready countdown, then follow warm and cold phases with haptics and a chime. Stop whenever you need to; a longer shower is not a better score.
Log the session and find a rhythm
Completed sessions record duration, cold time, and plan day. Add mood and a cold rating, choose a weekly session goal, and use Rest Mode when you need a break.
Made to be useful.
A timer made for the shower
Large controls, phase cues, and one free timer preset keep the session simple. Optional post-target timing records extra elapsed time only; it earns no streak, badge, or plan credit.
Progress without competing
Review your calendar heatmap, sessions, and 18 visible milestones against your own history. Rest days never count as completed sessions.
A backup you control
Manually save sessions, notes, plans, presets, and selected settings as a plaintext JSON file. Restore it from a destination you choose.
What you get
A clear place to begin.
Included to start
- 14-Day Starter plan, hands-free timer, and session log
- One timer preset, weekly rhythm goal, Rest Mode, and safety skip
- Session deletion and manual JSON backup and restore
Paid options
- Five additional plans, including Contrast Protocol and The Reset
- Full statistics, retro-logging and streak repair, CSV export, and unlimited timer presets
- Seated, silent breathing preparation before the shower—not during it
- Separate Apple Health opt-ins for mindful minutes or a nonmedical recovery nudge
- Optional on-device voice commands, enabled for each foreground session
Shiver Pro is an optional auto-renewing subscription. Manage or cancel it in your App Store account settings at least 24 hours before renewal. Local prices and purchase terms are shown in the app before purchase.
Your data, considered
Privacy, in practice.
Your session history and notes are stored on your device. A manual backup is plaintext: keep the file somewhere private.
Purchases and entitlement checks use Apple and RevenueCat. App updates use Expo; local activity storage does not mean the app never connects to the internet.
Health access and foreground voice commands are optional; touch controls remain available.
Read Shiver’s privacy policyA few things to know.
- Cold exposure is a physiological stressor. Read the safety guidance, stop if you feel unwell, and ask a qualified healthcare professional first if you have any concern about suitability.
- Shiver is a habit and timer tool, not a medical device or treatment. It does not measure water temperature or turn a shower into a cold plunge.
- Breathing preparation is seated and outside the shower. Extra time after a target is not an instruction to stay cold longer.