Help Center
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Guides, troubleshooting, and answers to the questions we hear most.
Last updated: October 23, 2025
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Getting Started
Choose the flow that matches your situation.
A) Create a new household (Household Owner)
Use this on the first device that will own and manage the household.
- 1Install BillPlex on your device.
- 2On the first screen, select “Create new household”.
- 3Set up your household members and (optionally) a monthly budget.
B) Join an existing household (Second person)
Use this on the device of the person who will share the same household data.
- 1Install BillPlex on the second device.
- 2On the first screen, select “Join existing household” (do not create a new one).
- 3Follow the on-screen instructions to pair with the Household Owner.
- 4The owner will confirm the request from the Household Sync screen.
C) Add more devices later
After the first connection, the Household Owner can add more devices to the same household.
- 1On the owner’s device: open Settings → Household Sync.
- 2Tap “Add new device”.
- 3On the new device: choose “Join existing household” and follow the pairing steps.
Household Sync
Keep multiple devices in sync for the same household — owner-controlled, local-first.
A) First-time setup between two devices
Use this flow when two people want to share the same household for the first time.
1) Steps for the Household Owner
- 1On the Household Owner’s device, open BillPlex → Settings → Household Sync.
- 2Tap “Add new device” to start pairing.
2) Steps for the second person (Join existing household)
- 1On the second person’s device, install BillPlex.
- 2On the first screen, select “Join existing household”.
- 3Follow the on-screen steps to detect the Household Owner’s device.
- 4Confirm the pairing on both devices when prompted.
B) Adding more devices to the same household
- 1At any time, the Household Owner can open Settings → Household Sync.
- 2Tap “Add new device” for each new device.
- 3On each new device, select “Join existing household” and complete pairing.
C) Syncing after initial setup
- 1To sync updates, open Settings → Household Sync on the Household Owner’s device and on the devices you want to update.
- 2On the Household Owner’s device, tap “Sync now” (or the equivalent sync action).
- 3Keep the Household Sync screen open on all devices until the sync completes.
D) Removing / unpairing a device
- 1On the Household Owner’s device, open Settings → Household Sync.
- 2Find the device you want to remove and choose “Remove / Unpair”.
Tips & clarifications
- The Household Owner controls which devices are part of the household.
- Make sure Bluetooth/Wi-Fi (or required nearby permissions) are enabled on all devices.
- Only one Household Owner device should act as the main source when syncing.
- If a device does not appear, reopen the Household Sync screen or restart the app.
- All transfers are local; household data is not uploaded to our servers.
Import / Export
Manual backups you control.
Export a backup
- 1Open the Export option in the app and set a PIN (minimum 4 digits).
- 2An encrypted backup file is created. Save or share it via your preferred method.
- 3The backup stays under your control — no cloud account required.
Use a non-trivial PIN and store backups in a safe location.
Import a backup
- 1Open Import (from Startup or Settings) and select your backup file.
- 2Enter the same PIN you used during export.
- 3Choose whether to merge or replace local data (when available), then confirm.
If the PIN is incorrect, the import cannot continue. We cannot recover your PIN.
- Backups are encrypted and offline unless you choose to share them.
- Optionally test an import on a secondary device before relying on a backup.
Troubleshooting
Quick fixes for common issues.
I can’t see my latest expenses
- Check active filters (month/year/category/member).
- Close and reopen the app.
- Verify that your device date/time is correct.
Import failed or PIN not accepted
- Check that you selected the correct backup file.
- Make sure you entered the exact PIN used during export.
- Move the file to local storage and try again.
Household Sync / pairing did not work
- Ensure Bluetooth/Wi-Fi and nearby permissions are enabled.
- Confirm one device is acting as Household Owner and others use Join existing household.
- Reopen the Household Sync screen or restart the app on both devices.
Frequently Asked Questions
How do I add an expense?
Open BillPlex → tap Add Expense → fill in amount, date, category, notes, member, and whether it is shared or personal → Save.
Where is my data stored?
Your expense data is stored locally on your device. You can optionally export an encrypted backup and move it manually between devices. See the Privacy Policy.
How do two people share one household?
One person creates the household and becomes the Household Owner. The second person installs BillPlex, chooses Join existing household, and pairs with the owner via Household Sync. Afterwards, the owner can add more devices if needed.
Is the app free?
BillPlex is free to download during launch. Core functionality will remain free; some advanced features may become optional in-app purchases.
Data & Privacy
BillPlex is built with privacy in mind. Your data stays on your devices, with optional encrypted backups and Household Sync fully controlled by you.
Still need help?
We usually reply within 1–2 business days.
Can’t find what you need? You can reach us directly by email.