The offline upload queue lets the app keep working with weak or no WiFi. Uploads that can't send right away stay in the queue and retry automatically once your iPad is back online.
Keep your app updated
HALO 4.x requires iOS 17 or later. HALO 5.0 requires iOS 26.1 or later. Keeping your app and iPadOS updated helps the queue work reliably, so check the App Store for updates regularly.
Don't sign out of the app or delete it while items are in the queue. Doing so erases the queue. Both actions show a warning to help prevent this. For more preparation tips, see the Pre-Event Checklist.
Queue basics
WiFi at venues is often unreliable. As long as pictures aren't marked as failed, the queue is working.
Uploads are paired with the participant's contact method. Once a photo uploads, it sends to the participant automatically.
Data collected through data capture is also stored in the queue.
Stuck uploads retry automatically when the iPad is connected to WiFi and the app is open or running in the background.
Queue notifications send push alerts for pending uploads. Turn them on at first launch or in your iPad's notification settings.
Videos and multi-frame layouts take longer to upload than single-frame images. For faster uploads, consider single-frame layouts.
Finding your queue
You can check your upload queue in the app or on your online dashboard. If your iPad is offline, the dashboard may not show an accurate queue count. The Devices page shows a "last seen" timestamp so you can confirm when your iPad was last online.
Online
Sign in to your dashboard and go to your Devices page, or open it from the top menu.
In the app
From settings: open settings in the app and look for the Queue tab at the bottom. A badge appears if uploads are pending.
From Mission Control: on the "Tap to Start" screen, slide two fingers apart to open Mission Control, which includes your queue and other tools. The gesture is tricky on purpose so guests don't open it by accident.
Causes of stuck or failed uploads
Outdated app version
Staying up to date with iOS and the app keeps the queue reliable. Check for updates before every event.
Environmental factors
Weak or firewalled WiFi, low iPad storage, too many open apps, or general device strain can slow or block uploads.
System errors
Rare software errors, such as "dependency issue" or "storage issue," can interrupt uploads.
Fixing stuck uploads
Before you start:
If items are in the Failed section, see Managing Failed Uploads.
If your queue is empty but your gallery is missing photos, check the brand moderation queue (Select plan only).
If your app wasn't up to date before your event, try to get your uploads to send before updating.
If items remain in the In Progress section of the queue, follow these steps:
Check environmental and system factors. Make sure you have at least 5 GB of free iPad storage (check and free up space), and close all other apps.
Restart the app and iPad. Close HALO, then turn your iPad off and on.
Check WiFi and test the queue. Reconnect to WiFi, reopen HALO, and take a test photo to trigger uploads.
Try multiple networks. If uploads remain stuck, repeat steps 2 and 3 on at least three different WiFi networks.
Using HALO 5.0? See Offline Upload Queue in the HALO 5.0 documentation.