Technician helping fix Tuya not discovering devices in Smart Life app

Steve H.

Expert ★★★★★ 27,853 satisfied customers

Specialities: Smart home app sign-out loops, account session issues, two-factor prompts, app cache problems, device sync glitches, password-change effects.

Common reasons a smart home app keeps signing you out and what to check first

Technician avatar Technician
Let’s start with the safest checks first. I don’t want you clearing everything or changing passwords in a rush if the app is only dropping its session.

When you get logged out, does it ask for the full password again, or does it just show the login screen and let you back in quickly?
Customer
It usually throws me back to the login screen. Sometimes I need the password, sometimes Face ID brings it back.
Technician avatar Technician
That difference matters. A full password prompt can point to account security or token expiry. A quick return through Face ID can mean the app session is being dropped locally on the phone.

Did this start after an app update, phone update, password change, or switching to a new phone or tablet?
Customer
It started a couple of weeks ago after my iPhone updated. I also think the app updated around the same time.
Technician avatar Technician
That timing is useful. This is common after updates, but we should rule out risks before assuming the app is broken.

Are your smart devices still there once you log back in, or does the app act like it forgot the home, rooms, or cameras too?
Customer
My devices are still there after I sign back in. It does not lose the setup. It just signs me out.
Technician avatar Technician
That is actually a good sign. If the home setup stays intact, this looks more like an account session problem than a full sync failure.

Quick safe check: are you signed into the same app on another phone, tablet, or an old device that you still own?
Customer
Yes, I still have it on my iPad. I do not use it much, but it is there.
Technician avatar Technician
Multiple signed-in devices can matter, especially if the app changed its session rules after an update. Some apps are fine with it, some become picky when they see older saved logins.

I don’t want you to try something that could make it worse, so I would not start by deleting the whole app. First I would want to know whether the sign-out happens after the app sits idle, after reopening it, or after a phone restart.
Customer
It is usually after the app sits for a few days. I open it and suddenly I am out again.
Technician avatar Technician
That leans more toward session expiration, saved-token trouble, or the phone clearing something the app expected to keep.

Are you using any privacy settings that offload unused apps, clear storage automatically, or block background activity for that app?
Customer
I do have Offload Unused Apps turned on, and I am pretty strict with background app refresh.
Technician avatar Technician
That is exactly the kind of detail that can explain a “random” logout pattern. It does not prove it, but it gives us a safe direction.

Another thing to rule out: have you changed your email password recently, enabled two-factor authentication, or approved a new sign-in anywhere else?
Customer
I changed my password about a month ago, yes. I also turned on two-factor not long before that.
Technician avatar Technician
Then we have three realistic suspects at once: app update behavior, iPhone app-management settings, and account security changes. None of those mean your smart home devices are failing.

Trust moment: I would avoid removing all devices or rebuilding the home. From what you said, the app still recognizes the account and setup after re-entry.
Customer
That is a relief. I was worried I would have to reconnect every light and plug.
Technician avatar Technician
I would not jump to that. When the app keeps logging you out every few days, the cleaner explanation is usually session handling, not device pairing.

One more check: when you sign back in, do you ever see a message about suspicious activity, expired session, verification code, or “account signed in on another device”?
Customer
I have seen “session expired” once or twice, but not every time.
Technician avatar Technician
That fits the pattern very well. A session can expire more often after account changes, app updates, or local app data being cleaned up by the phone.

Let’s keep this practical: the first goal is not to “fix everything.” It is to work out whether the sign-out starts with the account, the phone, or the app’s stored login token.
Customer
So this may be my phone clearing something, not the smart home app deciding to kick me out?
Technician avatar Technician
Yes, that is very possible. Especially when the setup survives and only the login is lost.

If an older signed-in tablet is still connected, or the phone has storage/privacy settings affecting the app, those are both safer places to look before blaming the devices or the whole account.
Customer
Okay, that makes a lot more sense now. I can check those without breaking the setup.
Technician avatar Technician
Exactly. Calm, one-change checking is the safest way here. If the pattern continues after reviewing device sessions, offloading settings, and recent account changes, then the app version and stored credentials become the strongest suspects.

Quick answer: the accepted fix

Accepted first checks when a smart home app logs you out every few days are: review whether the account password or two-factor settings changed recently; check if the same app is still signed in on another phone or tablet; look for phone settings that offload unused apps or restrict stored app data; and note whether the app shows “session expired” rather than a full account error. If the home setup stays intact after signing back in, treat it as a session or app-state problem first, not a device-pairing failure.

Why a login issue can look random even when it is not

5 GHz Wi-Fi often has higher speed, but it also has a shorter range and can be more sensitive to walls, TV cabinets, and nearby interference. New routers may also use DFS channels or wide channel widths (like 160 MHz) that work great for some devices but cause dropouts for others. If your network uses one Wi-Fi name for both bands, band steering can move a streaming device at the wrong time and trigger a “not connected” message. That’s why a simple compare test on 2.4 GHz is a useful diagnostic, not a step backward.

How to tell whether the problem is the app, account, or phone

Don’t judge by a one-minute test. A device can appear fine, then go offline during a longer video session when the connection is under steady load. After any single change, stream for a while and watch whether the device stays present in the router’s connected-devices list. If it drops and reconnects repeatedly, note whether the router changed channels or the device switched bands. This kind of observation keeps you from chasing the wrong cause.

Smart home app keeps logging me out — quick troubleshooting tips

Start with safe checks that isolate the cause before changing advanced settings.

Helpful checks: compare 2.4 GHz vs 5 GHz stability, look for WPA3-only security, and note if 5 GHz is using auto/DFS channels or very wide channel widths. If your router combines both bands under one name, consider whether band steering is moving the device mid-stream. Make one small change at a time and give it enough time to observe. If you’re unsure, stop and take notes — guessing can make the network harder to troubleshoot.

Disclaimer: This information is AI-generated and intended for general guidance only. Do not open devices or attempt unsafe electrical work. For advice specific to your Tuya/Smart Life device model and router settings, please consult a verified expert on Whizz-Tech or the manufacturer’s support before making decisions.

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FAQ

Why does my smart home app keep logging me out every few days?

This often happens after an app update, phone update, password change, or new security setting. In many cases, the saved session expires or gets cleared locally. It does not always mean your account is compromised.

Did this start after an update or password change?

It often can. App updates and account-security changes may invalidate older login tokens. That can force the app to ask you to sign in again even when the devices are still linked.

Is this an app problem or something wrong with my phone?

Either one is possible. If the app keeps your devices and rooms after login, the problem is often with session storage, app data handling, or account re-verification. Phone settings that offload apps can also play a role.

Can this be checked safely at home?

Yes. Review recent account changes, signed-in devices, and phone settings before removing the app or rebuilding your smart home setup. Start with those safe checks first.

Sources

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