Chronaut — Calendar Backup & Restore
Chronaut keeps a quiet record of every calendar on your iPhone, iPad, Mac or Android device: every deletion, every edit, with the time and the calendar it came from. When something disappears, Chronaut brings it back.
Install it today. Pay on the day you actually need it.
Good morning
Your calendars are backed up.
Last snapshot 14 minutes ago
3,412
events backed up
7
calendars
Watch an event disappear — and watch Chronaut bring it back.
Tue 16 September
Nothing lost today. Chronaut is watching. Deleted — “Dentist — Lena”, from Family Restored to Family. Nothing else touched.
RestoreThat is all there is to it. Chronaut never asks you to guess what was there — it shows the event, the calendar it came from, and the minute it went missing.
One screen shows you what happened. One tap on Restore is all it takes. Everything else, Chronaut shows you only when you want to see it.
On iPhone and iPad, snapshots run when you open Chronaut, when a calendar changes while it is open, on background refresh, and on a daily Shortcut you set up once. On the Mac, Chronaut sits in the menu bar all day and catches a change within seconds.
Chronaut backs up when you open it, as soon as a calendar changes, and schedules a background backup every 15 minutes – even after a restart. For a manual backup, tap “Back up now” or long-press the app icon.
Deleted, edited, created, moved to another calendar. Each entry carries the timestamp, the calendar it came from and the exact fields that changed. Every change stays traceable on its own.
Pick the event, confirm which calendar it lands in, restore. For a repeating series you choose “only this one” or “this and all following”.A deleted series comes back with its repeat rule; a single deleted occurrence comes back as an event of its own. Changed your mind? Undo is right there.
Two screens carry Chronaut: the log of what happened, and the moment it undoes the change.
Show for:
Switches the screenshots, features, prices and questions on this page.
This page describes both versions. Anything that applies to only one system is marked “Apple” or “Android”.
Changes
‹ Changes
Dentist — Lena
Family · changed 11:02
Time
Tue 16 Sep, 14:00–14:45
Wed 17 Sep, 09:15–10:00
Location
Dr. Hoff, Bahnhofstr. 4
Dr. Hoff, Lindenallee 12
Unchanged
Title, notes, attendees, repeat
Do send the invitations again afterwards.
This week
Last snapshot 40 seconds ago
A safety net under the calendar app you already use.
Whatever your device shows, Chronaut backs up — iCloud, Google, Exchange, CalDAV and local calendars.Google, Exchange, local and every other calendar Android syncs. Subscribed, holiday and birthday calendars are read-only by nature, so Chronaut records them but never offers them as a restore target.
Title, time, location, notes, attendees, recurrence rule, alarms, calendar. Old value on one side, new value on the other.
If an event was moved several times, Chronaut gives you back exactly the version you want — not just the last one.
Find by title, location or notes across everything Chronaut has recorded, grouped by the day it went missing.
Remove an account and Chronaut writes a single line — “14 events deleted” — instead of fourteen lines, then restores them into a calendar of your choosing.
Chronaut does not promise to be gapless. Chronaut shows you the last snapshot, the daily average over the past week, and what would make coverage denser.
Chronaut sits in the Mac menu bar and backs up continuously; Universal Purchase carries your iPhone or iPad purchase across.
“Back up calendars now” and “Show deleted events” run as Shortcuts on iPhone, iPad and Mac, so a daily automation keeps the history dense.
Chronaut backs up when you open it and as soon as a calendar changes, and schedules a background backup every 15 minutes. Android decides exactly when it runs — and it carries on by itself after a restart.
If battery optimization holds the backup back, Chronaut shows it on the “Battery & background” screen and takes you to the right settings — with tips for Samsung, Xiaomi, Huawei and OnePlus devices.
Long-press the Chronaut icon: “Back up now” starts a backup right away, “Trash” opens the trash directly.
The backup runs in full from the minute you install — free version included. What you pay for is seeing and restoring, on the day it matters.
| Feature | Free0 €Backup runs from day one | Most people need thisFull version6,99 €One-time. No subscription. |
|---|---|---|
| Backs up all your calendars | included | included |
| Weekly overview: how much was deleted or changed | included | included |
| Titles, original dates and details | not included | included |
| Full diff and earlier versions | not included | included |
| Restore with one tap | not included | included |
| Search the whole history | not included | included |
| History kept for | 1 year | 1 year |
| Mac app, backing up continuously | included | included |
Chronaut comes in a free and a full version. The full version is a one-time purchase at 6,99 € — on Apple and on Android alike. On Apple devices, one purchase covers iPhone, iPad and Mac and can be shared through Apple Family Sharing. Prices shown are the euro reference tier — the App Store shows yours. On Android, you buy the full version once through Google Play; the purchase covers all Android devices with your Google Account. Google Play shows the price you pay. A purchase in the App Store does not unlock Android, and vice versa.
Photos has a trash.Mail has a trash.Notes too.Calendar doesn’t.
“I like my calendar. It just can’t forgive.
For years it has bothered me that the calendar has no trash and no undo. One evening I fell asleep. My kid got hold of my Apple Watch and played with it — and two appointments were gone. No prompt, no notice, no way back.
The same thing happens in our shared calendar, only more quietly: somebody tidies up, an event is gone, and nobody can say what was in there before.
So I built what I was missing.
That is Chronaut.”
The job was clear from the start: back up automatically, show exactly what changed, and bring back every single event.
No second calendar app. No account. No subscription for the part you actually need.
Chronaut has no server. There is no account to set up, and nothing anywhere holds the keys to your calendars.
Two emails, ever: one when TestFlight opens, one when Chronaut is on the App Store or Google Play. That is the whole list.
No. Apple’s only recovery option is to roll all iCloud calendars back to an earlier point in time, which undoes everything else you did since. Google keeps a trash, but only for Google calendars and only in the browser. On Exchange it goes through an administrator. Chronaut works on the device, across every calendar it can see, and restores one event at a time.
Every calendar your device has: iCloud, Google, Exchange, CalDAV and local ones. Google, Exchange, local ones and every other calendar Android syncs. Subscribed, holiday and birthday calendars are read-only by nature — Chronaut records them but cannot write into them, so it never offers them as a target.
iOS removes the whole app container, and the history goes with it. Offloading the app keeps the data; deleting it does not. Chronaut says this during onboarding and keeps a permanent “backing up since …” line on the status screen, so it is never a surprise.
Uninstalling on Android deletes the whole history; it is deliberately excluded from Android backup. On a new phone, too, the history starts afresh. The status screen says so at all times: “On this device only – lost when the app is deleted.”
After reinstalling, “Restore purchase” brings your purchase back.
No, and Chronaut does not claim to. iOS or Android decides when an app may run in the background, so an event created and deleted between two snapshots cannot be recovered. Chronaut shows you how dense its coverage actually is and suggests what would improve it: a daily Shortcut, or the free Mac app, which runs all day and catches a change within seconds. on Android, above all the “Battery & background” screen in the app, if backups are late.
The essentials are the same: Chronaut backs up the calendars on the device, shows every deletion and edit and restores events — no account, no server, and the history stays on the device. Only Apple has the free Mac app, Shortcuts for automations and Family Sharing. On Android, Chronaut has no internet permission, and the “Battery & background” screen helps when the system holds backups back. The full version costs 6,99 € on both, but is bought separately: in the App Store for Apple devices, on Google Play for Android.
Yes. One purchase covers iPhone, iPad and Mac with the same Apple ID and can be shared through Apple Family Sharing. On the other device, tap “Restore purchase” once.
Yes, to every Android device with your Google Account. Tap “Restore purchase” under Settings › Purchase there; Chronaut also checks your purchases with Google Play every time it starts. The history does not move with you — it stays on the old device.
For iPhone, iPad and Mac, TestFlight first, then the App Store; the Android app comes through Google Play. There is no date yet; the honest answer is “when the restore flow is boring and reliable”. Leave your address above and you will hear from us on exactly those two occasions.
