---
title: Offline mode and synchronisation
description: "Subway, plane, no-signal job site: the Illizeo app keeps working for the essentials. Captured data is stored locally and synced when the network returns. - **Reading time**4 min - **Level**Intermediate - **Last updated**May 2026 - **Module**Mobile App ## Functions available…"
url: "https://illizeo.com/en/centre-aide/offline-mode-and-synchronisation/"
updated: "2026-09-21"
category: Mobile App
---

# Offline mode and synchronisation

Subway, plane, no-signal job site: the Illizeo app keeps working for the essentials. Captured data is stored locally and synced when the network returns.

- **Reading time**4 min
- **Level**Intermediate
- **Last updated**May 2026
- **Module**Mobile App

## Functions available offline

| Function | Offline | Sync |
| --- | --- | --- |
| Clock-in | Yes | On reconnect |
| Expense capture | Yes | On reconnect |
| Leave request | Yes | On reconnect |
| View payslips | Yes (already downloaded) | N/A |
| Directory | Yes (7-day cache) | N/A |
| FlexOffice map | Limited to cached resources | On reconnect |
| Approvals | No (needs real time) | N/A |

## Step-by-step

1. ### Enable advanced offline mode

   Profile → Preferences → *Advanced offline mode*. Pre-downloads payslips and directory.
2. ### Use as usual

   The app shows *Offline mode* at the top. Actions are stored locally with timestamp.
3. ### Verify sync

   On reconnect, a banner confirms sync. Tap to see transmitted actions.
4. ### Resolve conflicts

   If data changed in the meantime (e.g. request already approved via web), the app offers a merge.

## FAQ

   How long does local data persist?

Until sync, no limit. If the app is uninstalled before sync, offline-captured data is lost.

   Are my payslips encrypted on the phone?

Yes, AES-256 + key bound to your biometric identifier.

   What about long-haul flights?

Enable airplane mode. The app works. On the ground, sync runs as soon as Wi-Fi or 4G is back.

   What if sync fails?

The app retries every 5 min. On a real error (e.g. corrupted data), support receives an auto-alert.

### Security, biometrics, remote sign-out

Understand app protections and what to do if lost.

[See all Modules](/en/centre-aide/?cat=modules)

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