How Sync Works
When you add a strain to your stash, log a session, or generate a report, High IQ writes that data to Convex — a real-time database that pushes updates to all connected devices immediately. There is no manual “sync” button because sync is automatic and continuous.
Common Causes
Changes on one device not appearing on another
Changes on one device not appearing on another
Symptoms: You added a stash item or logged a session on your iPhone, but it does not appear on your iPad (or vice versa).Solution:
Verify same account
Make sure you are signed into the same account on both devices. Go to Settings (gear icon) in the app on each device and confirm the same email or Apple ID is shown.
Check internet connection
Real-time sync requires an active internet connection on both devices. Open Safari on the device where data is missing and confirm you can load a webpage.
Bring the app to the foreground
Sync reconnects when the app comes to the foreground. Open High IQ on the device that is missing data and wait 5-10 seconds for updates to arrive.
Data appears outdated or stale
Data appears outdated or stale
Symptoms: The app shows old information (for example, a strain you removed from your stash still appears, or a report does not reflect your latest sessions).Solution:
Pull to refresh
On most screens, pull down to trigger a refresh. This forces the app to re-fetch the latest data from the sync service.
Check for app updates
Older versions of High IQ may have sync bugs that have been fixed. Update to the latest version from the App Store.
Sync works on Wi-Fi but not on cellular
Sync works on Wi-Fi but not on cellular
Symptoms: Data syncs fine at home on Wi-Fi, but updates stop appearing when you switch to cellular data.Solution:
Check cellular data permissions
Go to Settings > Cellular on your iPhone, scroll down to find High IQ, and make sure the toggle is on.
Disable Low Data Mode
Low Data Mode can interfere with real-time connections. Go to Settings > Cellular > Cellular Data Options and turn off Low Data Mode.
Favorites or collections not syncing
Favorites or collections not syncing
Symptoms: Strains you favorited or added to a collection are not showing up as favorited on another device or after reinstalling.Solution:
Confirm you are signed in
Favorites are stored in your account. If you are using the app without signing in, favorites are local-only and will not sync.
Wait a moment
After favoriting a strain, give sync a few seconds. The heart icon or collection badge should update on other devices within 2-5 seconds on a stable connection.
Reports not reflecting latest data
Reports not reflecting latest data
Symptoms: You generated a report but it does not include sessions or stash items you recently added.Solution:
Check report generation time
Reports are snapshots generated at a specific time. If you added new data after the report was generated, the report will not include it automatically.
App shows 'Connection lost' or 'Offline' indicator
App shows 'Connection lost' or 'Offline' indicator
Symptoms: A banner or indicator appears in the app saying the connection to the sync service has been lost.Solution:
Check your internet
Open Safari and try loading any website. If it does not load, the issue is with your network, not the app.
Wait for automatic reconnection
The app will automatically attempt to reconnect every few seconds. If your network comes back, sync should resume without any action needed.
Understanding Sync Latency
| Scenario | Expected Latency |
|---|---|
| Both devices on Wi-Fi | Less than 1 second |
| One device on cellular | 1-3 seconds |
| App returning from background | 2-5 seconds to reconnect |
| After reinstalling the app | 5-15 seconds for full initial sync |