What I mean by this. Is it expected that overtime, the performance of a device will be reduced, and the software will work slower? This is assuming no changes in core OS (e.g upgrade from 4 to 5 etc). For example, does installing and removing apps leave traces behind, that over time build up and slow the OS?

Is there any indication that a user can look for, in order to determine if its time to flash the device, and re-install the OS?

p.s Lets ignore the scenario where a bunch user installed process-hog- background apps are killing the device.

  • Note: "re-install the OS" won't be required, as that resides on a read-only partition. Still, a factory-reset sometimes does wonders (but you should backup your stuff before, so you can restore it afterwards).
    – Izzy
    Commented Jul 10, 2015 at 16:18
  • "..clutter similar to Desktop OS" -- Using Slackware Linux here for 16 months, don't know what clutter really mean unless you meant "Desktop" as "Windows". As for the indication part, you can tell by your experience as a user of device by comparing your first impression of device and your present one.
    – Firelord
    Commented Jul 10, 2015 at 21:41
  • @Firelord not very helpful comment tho, because it is hard to remember first impressions of device.
    – user109933
    Commented Jul 11, 2015 at 22:11

1 Answer 1


Simple answer: Yes, but it's usually not noticeable and won't impact a device's ability to function as expected during it's lifetime.

Full Explanation: Apps CAN leave traces of information behind when uninstalled. These are usually empty folder and misc. log files, but can also include files created by the application but are assumed that the user would want to keep (screenshot folders come to mind). Although these hardly affect performance, they can eventually take up space and introduce unwanted clutter in your mounted storage volume. Purge with aplomb.

Another area of possible concern is the concept of "bit-rot", or "bit-decay". This is the decay of data stored in a solid-state format, unaltered, for long periods of time due to the dispersion of the electric charge used to maintain the data. An OS of a phone could be subject to this phenomenon over the course of many years (usually more than a decade) because the data of an OS rarely changes in the scenario you present (not updating and never re-installing). Though reinstall the OS will refresh the memory locations it's stored on, the process of bit-rot takes a long time on properly manufactured devices, and isn't likely to cause any sort of problems in the 2-3 year timeframe most individuals keep their phones and tablets nowadays.

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