If the ChatGPT app is not working on iOS or Android, start by separating three causes: an OpenAI outage, an account or login problem, or a local phone issue. The fastest fix is usually to force close the app, switch between Wi-Fi and cellular data, update the app, confirm your login method, and check OpenAI’s status page before reinstalling. On iPhone, pay special attention to iOS compatibility, Safari cookie settings for sign-in, and any crash pattern tied to keyboards or Accessibility settings. On Android, confirm Google Play is installed and current, then clear app storage only after you know your account credentials.
Quick triage before you reinstall
Do not start by deleting the app. First, identify the failure type. If ChatGPT opens but messages fail, you may be seeing a service issue, a network restriction, or a model-side error. If the app will not open, freezes on launch, or crashes after tapping a conversation, treat it as an app or device problem. If the app opens but refuses to sign in, focus on authentication, cookies, account method, VPN, and device integrity.
Use this order because it avoids unnecessary data loss and saves time:
- Open status.openai.com in a browser and check whether ChatGPT has an active incident. OpenAI says its availability metrics are reported at an aggregate level across tiers, models, and error types, so your account can still be affected even if the page looks normal.[7]
- Switch networks. Test Wi-Fi, then cellular data. If ChatGPT works on cellular but not Wi-Fi, the issue is likely your router, DNS, firewall, VPN, school network, or office network.
- Force close the app and reopen it. This clears a stuck session without touching your account.
- Update the app from the App Store or Google Play. OpenAI also recommends using the latest app version when troubleshooting DeviceCheckError.[6]
- Try ChatGPT in a mobile browser. If the browser works but the app does not, you have narrowed the problem to the native app, the app’s local data, or app-store services.
If you see a specific error, use that wording. A ChatGPT network error, something went wrong error, too many requests message, or internal server error points to a narrower fix than a generic “app not working” report.
iPhone and iPad fixes
On iPhone and iPad, first confirm that you are using the official ChatGPT app. OpenAI’s iOS download guidance says to search the App Store for “openai chatgpt” and make sure the app is published by OpenAI.[4] Apple’s App Store listing identifies OpenAI OpCo, LLC as the seller and lists the current compatibility requirement as iOS 17.0 or later for iPhone and iPadOS 17.0 or later for iPad.[8] If your device is stuck on an older operating system, the native app may not install or update. In that case, use ChatGPT in a browser if the web version is available for your account and region.
Use these iOS steps in order:
- Force quit ChatGPT. Open the app switcher, swipe ChatGPT away, then reopen it.
- Restart the device. This clears stuck network and sign-in handoff states.
- Update ChatGPT. Open the App Store, search for ChatGPT, and apply any available update.
- Update iOS or iPadOS. If your device supports a newer OS, install it from Settings. This matters most when the app no longer supports your current OS.
- Check Safari cookies if Google sign-in fails. OpenAI says a “Cookies are disabled” error with Google authentication on iOS requires disabling Safari’s block-cookies setting.[2]
- Disable VPN or content filters temporarily. This includes iCloud Private Relay, DNS filters, work profiles, and security apps that intercept login pages.
- Reinstall last. Delete ChatGPT only after you know your account email and login method. Then reinstall the official app from the App Store.
If the app crashes repeatedly, document the pattern before contacting support. OpenAI asks iOS users with app crashes to share the ChatGPT account email, iPhone model, iPhone language, custom keyboards, Accessibility settings, and details such as whether the crash happens on Wi-Fi, cellular data, or after continuing a web-started conversation.[1] That list is useful even if you solve the issue yourself. It tells you which variables to test one at a time.
Android fixes
On Android, confirm that you installed the official app from Google Play. OpenAI’s Android FAQ tells users to search Google Play for “openai chatgpt” and verify that the app is published by OpenAI.[3] The Google Play listing describes the ChatGPT Android app as the official app and says it syncs history across devices.[9] Avoid APK mirrors while troubleshooting. Side-loaded copies can add signing, update, Play Integrity, or account-handoff problems that look like a ChatGPT outage.
OpenAI lists the minimum Android requirement as an Android device with Google Play running Android 7.0 or newer.[3] If your phone does not have Google Play services, uses a heavily modified ROM, or blocks Play services in the background, the native app may fail even when the website works.
Use these Android steps in order:
- Force stop ChatGPT. Open Android Settings, go to Apps, choose ChatGPT, then tap Force stop.
- Update ChatGPT from Google Play. Do not update from an unofficial source.
- Update Google Play Store. OpenAI says a “Something went wrong” login error on Android can happen when the Google Play Store version is out of date, and recommends updating the Play Store before trying again.[3]
- Switch networks. Test cellular data if Wi-Fi fails. If your phone is Wi-Fi only, try another trusted network.
- Clear cache. In Android Settings, open ChatGPT storage settings and clear cache. This is lower risk than clearing all app data.
- Clear storage only if needed. This signs you out and removes local app state. Confirm your login method first.
- Reinstall from Google Play. If the problem survives cache clearing and updates, uninstall and reinstall the official app.
Android permission issues usually affect features, not the whole app. Microphone problems point to voice permissions. Photo and file problems point to media or document permissions. If the app works except for uploads, use our ChatGPT file upload not working guide. If voice fails but text works, use the voice mode troubleshooting guide.
Login and authentication errors
Many app failures are really login failures. The most common mistake is using the wrong sign-in method. OpenAI says that if you originally signed up with Google, Microsoft, Apple, or username and password, you must continue with the same method; using a different method can trigger “wrong authentication method” or similar account errors.[2]
Work through this checklist:
- Try the original login method. Test Continue with Google, Continue with Apple, Continue with Microsoft, and email/password only if you are unsure.
- Check Apple Hide My Email. If you signed up with Apple, your ChatGPT account may be tied to a private relay address rather than your everyday email.
- Allow cookies and JavaScript. OpenAI’s login guidance says cookies, including third-party cookies, and JavaScript should be allowed for ChatGPT, OpenAI, and OpenAI authentication domains.[2]
- Turn off blockers temporarily. Ad blockers, DNS blockers, cookie managers, and privacy tools can break login buttons or verification flows.
- Use a browser test. Sign in at ChatGPT in a mobile browser or desktop browser. If that works, return to the app and try again.
- Turn off VPN while testing. If ChatGPT works without the VPN, use our ChatGPT VPN issues checklist before turning it back on.
If you see DeviceCheckError, treat it differently. OpenAI says this error usually means it could not generate a token for the specific device, and recommends automatic date and time, a stable connection, app and operating system updates, and device integrity checks.[6] Rooted Android phones, jailbroken iPhones, modified ROMs, aggressive certificate inspection, and some enterprise device controls can all make this class of error harder to fix.
Crashes, blank screens, and slow loading
A crash means the app process closes. A blank screen means the app opened but did not render the expected interface. Slow loading means the app is alive but waiting on network, authentication, model response, or account state. The fixes overlap, but the diagnosis is different.
| Symptom | Most likely cause | Best first fix | Next guide if it persists |
|---|---|---|---|
| App closes immediately | App build, OS, device integrity, or local data | Force close, restart phone, update app, then reinstall | This article |
| Blank white or black screen | Stuck app state, blocked network request, or failed login handoff | Switch networks and reopen the app | ChatGPT login failed |
| Messages do not send | Network restriction, outage, rate limit, or conversation issue | Check status and try a fresh chat | error in message stream |
| Responses are very slow | Network congestion, model load, account tier, or service degradation | Compare Wi-Fi, cellular, and web | why ChatGPT is slow |
| Only images, files, or voice fail | Feature-specific service issue or permission problem | Check permissions and feature status | image generator fixes |
If one conversation fails but a new chat works, the app is probably not broken. The specific conversation may be too long, may contain a failed tool result, or may have a temporary stream issue. Copy the last prompt into a new chat and continue there. If every chat fails, move back to outage, login, and network checks.
Outage or device problem
The same symptom can come from OpenAI’s service or your phone. A March 11, 2026 OpenAI status incident reported elevated conversation errors for ChatGPT, with recovery listed at 9:59 PM.[10] During that kind of incident, reinstalling the app will not help. Your best move is to confirm the incident, avoid repeated retries, and use another workflow until the service recovers.
Use comparison testing. Try the app on cellular data. Try ChatGPT in a browser. Try a second device on the same account. Ask someone on a different network to test. If every path fails at the same time, suspect a service issue. If only one phone fails, suspect app data, OS compatibility, permissions, network filtering, or device integrity.
For broader context, keep our ChatGPT outages 2026 timeline and ChatGPT outage history handy. If the app says ChatGPT is at capacity, use the capacity troubleshooting guide. If you see gateway-style errors, compare your message with the 500 error, 502 Bad Gateway, and 503 Service Unavailable guides.
When to contact OpenAI support
Contact support when you have isolated the problem and basic fixes do not work. A useful report includes your account email, device model, operating system version, app version, network type, error message, screenshots, and the exact time the problem occurred. OpenAI’s iOS crash guidance specifically asks for device details, language, custom keyboards, Accessibility settings, and examples of when the crash happens.[1]
Before you file a support request, try one clean test. Turn off VPN and filters. Use a trusted network. Set date and time to automatic. Update the app. Restart the phone. Then reproduce the issue and capture the screenshot. This gives support a cleaner signal than a long list of changes made after the fact.
Do not share passwords, verification codes, recovery codes, or payment card details in screenshots. If the issue involves a subscription purchased through the App Store, OpenAI’s iOS FAQ says users who subscribed in the Apple App Store can use Restore purchases in the ChatGPT iOS app.[5] If the issue is about plan limits rather than app failure, use our ChatGPT daily limit and ChatGPT Plus message limit explainers instead.
Frequently asked questions
Why is the ChatGPT app not working but the website works?
That usually means the issue is local to the native app, app-store services, cached app data, or a mobile-only login handoff. Update the app, force close it, switch networks, and sign in again. If the browser continues to work, reinstall the app only after confirming your account login method.
Why does ChatGPT work on Wi-Fi but not cellular data?
Cellular problems can come from weak signal, carrier filtering, private DNS, a mobile VPN, or data-saver settings. Toggle airplane mode, disable VPN, and test a browser login. If Wi-Fi works consistently, the ChatGPT service itself is probably not down for your account.
Why does ChatGPT work on cellular but not Wi-Fi?
This points to your router, DNS provider, firewall, school network, office network, or VPN. Restart the router, disable DNS filtering, and try another Wi-Fi network. If you are on a managed network, ask the administrator whether authentication and Cloudflare challenge traffic is being blocked.
Should I delete and reinstall the ChatGPT app?
Reinstalling is useful for crashes and corrupted local app state, but it should not be your first step. Force close, restart, update, and test another network first. Reinstall only after you know which email and sign-in method belong to your ChatGPT account.
Can a VPN make the ChatGPT app stop working?
Yes. A VPN can trigger suspicious-login checks, block authentication, slow responses, or route traffic through a region with different access behavior. Turn the VPN off for one clean test. If that fixes it, change VPN region or split-tunnel ChatGPT traffic.
What should I do if ChatGPT says DeviceCheckError?
Set date and time to automatic, switch networks, update the app, update the operating system, and restart the phone. If the device is rooted, jailbroken, heavily modified, or managed by an organization, integrity checks may fail. Try the same account on another device to confirm whether the problem follows the phone or the account.