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Only on your iPhone. Chio has no account and never connects to the internet, so your entries are not sent to us or to anyone else. The widget reads the same data on the same device.

Chio 1.0 has no iCloud sync, so entries do not move to another device on their own. If you set up the new iPhone from a full backup of the old one (iCloud Backup or a computer backup), iOS normally restores app data too, including Chio's. If you set up the new iPhone as new, Chio starts empty. iCloud sync is planned for a later version.

Home Screen: touch and hold an empty area → Edit → Add Widget → search for Chio → pick the small or medium size → Add Widget. Lock Screen: touch and hold the Lock Screen → Customize → Lock Screen → tap the widget area → Chio. The widget shows your pinned and suggested tiles; tap one to record it without opening the app.

Suggestions come from what you have logged before, at similar times and on similar days. In the first days, log as usual; the suggested row fills in as Chio sees your routine.

On Home, tap Edit next to Pinned. You can pin up to 4 items, remove them, or drag to reorder. Pinned tiles never move on their own.

Right after a tap, the Recorded bar shows Undo and a way to change the amount. Later, open History, tap the entry to edit it, or tap Edit to delete it.

Yes, in Settings → Currency. You can keep your numbers as they are and only change the symbol, or convert every amount at a rate you enter yourself.

Settings → Erase All Data. This deletes every entry, pin and setting on this iPhone and cannot be undone.