Everything you need to join the VivaLynx beta on an Android phone or tablet, from your invitation email to your first bug report.
Before you start
The Google account you were invited with, signed in on the device you'll test with
The email address the VivaLynx team used to send your invitation
Android 10 or later, with at least 500 MB of free storage
A stable Wi-Fi or mobile data connection
Use the Google account we invited
The Google account you sign in with — on your device and on the Firebase download page — has to be the exact address we sent your invitation to.
With a different account you won't be recognized as an authorized tester, and the download won't be available to you.
If you'd rather use a different Google account, email [email protected] and we'll send a fresh invitation to it.
To check which one you're on: Settings → Google — the account shown at the top.
Install VivaLynx
1 — Open your invitation email. Look for a message from Firebase App Distribution or the VivaLynx team, with a subject line like "You've been invited to test VivaLynx." Open it on the Android device you'll test with — the link won't work from a computer.
2 — Don't search the Play Store. VivaLynx isn't listed on Google Play during the beta, so searching finds nothing. The link in your email is the only thing that installs the real build. Anything you find by searching is a different app.
3 — Tap the invitation link. Tap Get started in the email. Your browser opens a web page. If you're asked to sign in, use the Google account that matches your invited email address.
4 — Tap the blue Download button. This downloads VivaLynx straight to your device. There's no separate "App Tester" app to install first.
5 — Allow installs from this source. Android shows a one-time prompt asking whether to allow app installs from your browser or from Firebase App Distribution. Tap Settings, turn on Allow from this source, then go back and continue.
Tapping away from this prompt stops the install with no explanation. Start the download again if that happens. Android only asks once per device.
6 — Install and open. When the download finishes, tap the file, then Install. When it completes, tap Open.
7 — Sign in. Follow the onboarding in the app to create your account, or sign in if one was already created for you.
Turn on fingerprint or face unlock
VivaLynx can offer faster sign-in, but only if it's already set up on your phone.
Settings → Security & privacy → Biometrics — check you have a screen lock (PIN, pattern or password) and at least one fingerprint or face registered. The menu name varies by phone maker.
Open VivaLynx, go to User Profile, and turn on biometric sign-in.
If VivaLynx doesn't offer it, or forgets it after you close the app, check those device settings first. If it still doesn't work, tell us your device model and Android version.
If your invitation never arrived
Check spam or junk for a message from Firebase App Distribution.
Check the address matches. The invitation goes to one specific Google account — see above.
Still nothing? Email [email protected] and we'll resend it, so you have a fresh link to tap directly from your phone.
Getting app updates
We ship new builds regularly during the beta.
You'll get an email from Firebase App Distribution when one is ready.
Open it on your Android device and tap the blue Download button.
Install it the same way you installed the first build.
Android updates don't send a push notification, so watch for those emails. Test on the newest build when reporting an issue, unless we've asked you to confirm something on an older one.
Telling us what you find
Anything confusing, broken, slow, or worth improving. Small things count — they're often the ones nobody else mentions.
Firebase App Distribution has no built-in feedback tool, so email [email protected] or use the chat button in the bottom-right corner of this page. We respond within 1–2 business days during the beta.
What to include
What you were trying to do, and what happened instead
Steps to reproduce it, numbered if you can
Your device model and Android version — Settings → About phone → Android version
Your VivaLynx build number — Settings → About, inside the app
A screenshot or short screen recording, for anything visual
Your role — Care Recipient, Family Caregiver, or Professional Caregiver
What to leave out
VivaLynx is a HIPAA-adjacent health app, and bug reports get read by several people. Keep real medical details, exact addresses and other sensitive personal information out of screenshots and reports. Use placeholder or test data where you can.
If a screenshot only makes sense with real content in it, crop or black out the sensitive parts before sending.
Need help
Chat with us — the blue button in the bottom-right corner of this page
Email [email protected]
In-app: the contact support link inside VivaLynx, once you're signed in
Thank you for helping us build VivaLynx. Care, connected.