An application will not open at all

You press the icon, the application opens for a fraction of a second then closes immediately; or it displays a frozen screen; or it simply refuses to start. An application that won’t open is annoying, especially if it’s one you use every day. Good news: in most cases, it’s neither serious nor permanent, and some simple steps—performed in the right order—can get the app running again. Here’s how to methodically react to an app that won’t open, on both your phone and your computer.

Why an app won’t open

An app that won’t open almost always has a benign and fixable cause: it’s rare for an app to be « definitely broken. » Understanding frequent causes helps apply the right remedy. A TEMPORARY BLOCK: the app has « crashed » (stuck in a bad state) and refuses to restart; this is the most common and easiest to fix cause (close and reopen, restart). A NEED FOR UPDATE: an out-of-date app may stop working (incompatibility with a new system version, bug fixed in a later version). An outdated operating system: conversely, a recent app may require a more recent system. A LACK OF SPACE: if the device is full (storage is full), apps struggle to open or crash (our full storage guides). CORRUPT APP DATA: temporary files (the « cache ») or app data may become corrupted and prevent it from starting; clearing them often fixes the problem. A DEVICE OVERLOADED: too many apps open, memory is full; the app doesn’t have the resources to launch (a restart frees everything). A BUG IN THE APP ITSELF: a faulty version of the app (correct by updating, or report to the developer). A PROBLEM WITH THE ACCOUNT or CONNECTION: some apps need Internet or a connection to an account to start; a network issue or incorrect credentials can block it. Less frequently: a conflict with another app, or an app that has become incompatible with an older device. What to remember: most causes are TEMPORARY or EASY to fix (temporary block, update, cache, space, restart); it’s rare to have to give up an app. The approach is to try the simplest solutions first (close/reopen, restart) and move to more advanced ones (clear data, reinstall) until it works. The main idea: an app that won’t open is almost always fixable; causes range from a temporary block to a need for an update or space; proceeding from simplest to most advanced, you can get it running in most cases without losing anything.

Solutions, from simplest to most advanced

Here’s the procedure, in order: stop as soon as the app starts working. 1. CLOSE the app completely and reopen it — don’t leave it just in the background: close it properly (via the open apps manager), then relaunch it; this resolves most temporary blocks. 2. REBOOT the device — the universal remedy: turn off and restart your phone or computer; a reboot frees memory, closes blocked processes, and resolves a large number of cases where an app won’t open. 3. CHECK FOR UPDATES — update the app (a newer version often fixes the bug), and also check for updates to the device’s SYSTEM (a recent app may require an updated system — our update guides). 4. FREE UP SPACE — if your device is almost full, make some space (delete files, photos, unnecessary apps); lack of space often prevents apps from starting (our full storage guides). 5. CLEAR the app’s CACHE / TEMPORARY FILES — in the settings, at the app’s profile, you can often clear its cache (temporary files) without losing your data: this fixes cases of corrupted temporary data; it’s an effective and risk-free solution. 6. CHECK THE CONNECTION and ACCOUNT — if the app needs Internet or an account: check your connection, and that you are properly connected to your account (re-authenticate if needed). 7. REINSTALL the app — as a last resort: uninstall and reinstall the app (from the official store) — it starts from a clean, new version, and resolves cases of corrupted installation. BE CAREFUL: reinstalling may erase locally stored data not backed up — check first that your important data is backed up or linked to an account (it will return on reconnection) before uninstalling. Some TIPS: proceed in ORDER and stop as soon as it works (no need to reinstall if a simple reboot suffices); always install apps from OFFICIAL STORES (a dubious origin app may not work well or be risky); if a specific app crashes just after a system or app update, the bug likely comes from there (wait for a fix, or report it to the developer); and if your device is very old, a recent app may no longer be compatible (check the required configuration). In summary, from simplest to most advanced: close/reopen the app, reboot the device, update (app and system), free up space, clear the cache, check connection and account, and as a last resort reinstall (after checking your backups). This graduated approach gets the vast majority of stubborn apps running.

The right reflex. Proceed from the simplest to the most advanced, and stop as soon as the app starts working. First, CLOSE the app completely (not just in the background: via the open apps manager) and reopen it — this resolves most temporary blocks. If that persists, REBOOT the device: this is the universal remedy that frees memory and closes blocked processes; it resolves a large number of cases on its own. Next, CHECK FOR UPDATES (of the app — a newer version often fixes the bug — and the system, as a recent app may require an updated system), and FREE UP SPACE if your device is almost full (lack of space often prevents apps from starting). An effective and risk-free solution: CLEAR the app’s cache (temporary files) in its settings profile — this fixes corrupted temporary data without losing your data. Also check the connection and ensure you are properly connected to your account if the app needs one. As a LAST RESORT only, REINSTALL the app (uninstall and reinstall from the official store, to start from a clean, new version) — but before, check that your important data is backed up or linked to an account, as reinstalling may erase locally stored data not backed up. There’s no need to reinstall if a simple reboot suffices: that’s the whole point of proceeding in order. Two useful references: if a specific app crashes just after an update (of the app or the system), the bug likely comes from there — wait for a fix or report it; and if your device is very old, a recent app may no longer be compatible. This graduated approach gets the vast majority of stubborn apps running without losing anything.

When an app remains stuck or disappears

In some cases, the app resists all simple solutions, or the problem is broader; here’s how to react. If the app doesn’t work despite all simple solutions (closing, rebooting, updating, space, cache, reinstalling): the problem likely comes from the APP itself (unfixed bug) or INCOMPATIBILITY (device or system too old for this version); check the app’s required configuration, search if other users report the same issue (the developer may be working on a fix), and contact the app’s SUPPORT (via its profile in the store or its website); sometimes, only a future update will solve the problem. If several apps crash at the same time: the problem isn’t a specific app but the DEVICE or SYSTEM: general lack of space, system update needed, device overloaded or in trouble; treat the global problem (free up space, update the system, reboot, and if needed have the device checked — our guides for sluggish computers, sluggish phones). If the app has disappeared (icon unfindable): it may have been moved (look for it, it’s often in a folder or via the device’s search), accidentally uninstalled (reinstall it from the store), or removed from the store (some apps are abandoned by their developer or become unavailable — look for an alternative). If your data seems lost after a reinstall: check if the app synchronizes it with an account (it will return on reconnection); otherwise, purely local data not backed up can be lost (reminder of the importance of regular backups — our guides for regular backups). WHEN TO ASK FOR HELP: if an important app remains unusable despite all efforts, if several apps crash (device problem), or if you fear losing data by manipulating: the app’s support (for a specific app) or a professional (for a device problem) can help. A reassuring point: an app that doesn’t open rarely puts your data at risk; they are generally stored separately (in the device or an account), and a clean reinstall usually finds them. In summary, the vast majority of stubborn apps can be fixed by the simple approach (close, reboot, update, space, cache, reinstall); for resistant cases, look for a bug in the app (developer support, future update) or a device problem (if several apps crash); and remember that the issue is almost always fixable and your data almost always preserved.

BE CAREFUL: do not reinstall without verifying your backups, and install only from official stores. Caution points. UNCAUTIOUS REINSTALLATION — reinstalling an app is an effective solution, but it can erase locally stored data not backed up; before uninstalling, check that your important data is well backed up or linked to an account (it will return on reconnection); do not reinstall in haste an app containing valuable data not backed up. NON-OFFICIAL SOURCES — always install or reinstall your apps from the official stores of your device: an app downloaded from a dubious site or non-official source may not work well, be a tampered version, or contain malware; an app that « won’t open » is never a reason to seek it elsewhere than in the official store (our guides for unwanted apps). Other traps: skipping simple steps to go directly to reinstalling (often a reboot suffices — proceed in order), ignoring a lack of space or an outdated system (frequent causes we often forget), persisting on an app that has become incompatible with an old device (check the required configuration), and panicking about your data when they are generally preserved (stored separately or in an account). Finally, if several apps crash at the same time, do not look for the problem in each app: it’s the DEVICE or system that needs to be treated (space, update, reboot). An app that won’t open is almost always fixable by simple and risk-free actions; proceed methodically (from simple to advanced), protect your data before any reinstall, and stay on official sources. The issue is benign in the vast majority of cases: no panic, no haste.

Frequently asked questions

My application closes as soon as I open it, what should I do?

Proceed from the simplest to the most advanced, stopping as soon as it works. CLOSE the app completely (via the open apps manager, not just in the background) and reopen it — this resolves most temporary blocks. If that persists, REBOOT the device (the universal remedy: it frees memory and closes blocked processes). Then, UPDATE the app (a newer version often fixes the bug) and check for system updates. FREE UP space if your device is almost full. CLEAR the app’s cache (in its settings profile: this fixes corrupted temporary data without losing your data). As a last resort, REINSTALL the app from the official store (after verifying that your important data are backed up or linked to an account). This graduated approach resolves the vast majority of cases where an app closes immediately: it’s almost always a temporary block or a need for an update, not a serious issue.

Will I lose my data if I reinstall the application?

It depends on where your data are stored. Many apps synchronize their data with an account (online): in this case, reinstalling doesn’t lose anything — your data return as soon as you reconnect to your account. However, purely local data of an app (stored only on the device, not backed up or linked to an account) can be erased by a uninstallation. So BEFORE reinstalling: check if the app uses an account (data preserved) or stores locally (data at risk); back up what’s important if possible; and do not reinstall in haste an app containing valuable data not backed up. Be reassured: in most cases, the data are either linked to an account or recoverable; and often, reinstalling is not necessary (a reboot or update suffices). Reinstalling is a last resort: try the simple and risk-free solutions first.

Several applications crash at the same time, is that serious?

It’s probably not a problem with each app, but with the DEVICE or SYSTEM: when several apps crash together, the cause is usually global. The usual suspects: a general lack of space (device almost full — make space), an outdated operating system (needs an update), an overloaded device (too many things open, memory full — reboot), or a device that’s fatigued. So treat the global problem rather than trying to fix each app: free up space, update the system, reboot the device. If the problem persists after these steps, or if the device shows other signs of weakness (general slowness, blocks), have it checked (our guides for sluggish computers, sluggish phones). It’s not necessarily serious — often just a device to be relieved (space, update, reboot) — but it’s the sign that you need to take care of the device as a whole, not just an app.

What to remember

An app that won’t open is annoying, but almost always benign and fixable: it’s rare for an app to be definitively broken. Frequent causes are temporary or easy to fix: a temporary block (most common), a need for an update, a lack of space, corrupted temporary data, or an overloaded device. The approach: try the simplest solutions first and stop as soon as it works. In order: completely close the app and reopen it (resolves most blocks); REBOOT the device (the universal remedy, resolves many cases); update the app and the system; free up space if the device is full; CLEAR the app’s cache (effective and risk-free); check the connection and account if the app needs one; and as a last resort, reinstall the app from the official store. Before reinstalling, check that your important data are backed up or linked to an account (reinstalling may erase locally stored data not backed up; those linked to an account return on reconnection). Never install from non-official sources (risk of a tampered or malicious version). For resistant cases: if an app remains blocked despite all efforts, it’s likely a bug in the app or incompatibility (check the required configuration, contact the app’s support, wait for a fix); if several apps crash together, the problem is the DEVICE or system (treat the global issue: space, update, reboot). Be reassured: an app that won’t open rarely puts your data at risk (they are generally stored separately or in an account). By proceeding methodically, from simple to advanced, protecting your data, and staying on official sources, you can get the vast majority of stubborn apps running — without panic and without losing anything.