What prerequisites are necessary for synchronization?
For synchronization to work reliably, certain requirements must be met. These vary depending on the synchronization type:
iCloud / CloudKit Synchronization
To synchronize your data via iCloud, you need:
- Internet connection: Your device must be connected to the internet.
- iCloud server availability: Apple servers must be accessible (you can check for occasional outages on the Apple System Status page).
- Apple ID login: You must be signed in to iCloud with your Apple ID.
- Sufficient iCloud storage space: Make sure your iCloud storage still has space for the synchronization data.
Folder Sync
If you use syncing via a folder (e.g., on a NAS or a network drive), please note:
- Access to the folder: The folder must be accessible and mounted (e.g., connected to a network share).
- Read and write permissions: You need both read and write permissions for the folder and all files it contains.
- Stable connection: Network folders require a stable network connection (LAN or Wi-Fi).
Tip: Check whether you can open the folder outside of the app and save files to it. If this is not possible, syncing will not work.
Device-to-device sync
For direct syncing between two devices (e.g., iPhone ↔ Mac or iPhone ↔ iPad), the following conditions must be met:
- Wi-Fi enabled: Both devices must have Wi-Fi enabled and be on the same Wi-Fi network.
- Access to the local network allowed:
- On iOS/iPadOS: Check in the System Preferences whether the app has access to the local network (see screenshot below).
- On macOS: Check the local network permissions in the System Preferences
- Privacy & Security > Local Network > Enable SimpleumSafe
- Bluetooth enabled and allowed: Bluetooth must be enabled on both devices, and the app requires the appropriate permission.
- On iOS/iPadOS: Check in the System Preferences whether Bluetooth permissions are enabled (see screenshot below).
- On macOS: Check in the System Preferences whether Bluetooth permissions are enabled
- Privacy & Security > Bluetooth > Enable SimpleumSafe
- Both devices unlocked: To enable the devices to find each other, they should be enabled and unlocked.
Note: In some Wi-Fi networks (e.g., corporate or guest Wi-Fi networks), connections between devices are blocked. In this case, synchronization may not work.
This is what the app settings should look like on iOS
