MMY app storage & data

The MMY app download is 19.98 MB. That number is the file, not the space the app ends up using. Three separate things consume space, and only one of them is the download.

The three layers of space

First is the download itself: 20,954,528 bytes, which is the 19.98 MB figure. Second is the unpack. Android expands the package during install, so the installed copy is larger than the file you fetched, and the exact installed size has not been measured on a device. This page does not guess it. Third is the asset fetch on first open, which the first launch page covers. Those assets sit in the app's storage and are what make the app usable.

Keep 150 MB free before you start. A data partition with less than that can fail mid-install or mid-fetch, and the error looks like a bad file when it is only a full disk.

Why the app grows after updates

Each update replaces the code but does not always replace the cached assets one for one. Old assets linger until something clears them, so an app that started near the download size can sit well above it after a few updates. That growth is cache, and it is reclaimable.

Growth that returns immediately after you clear cache is the asset set being fetched again, which is expected once, not a leak. Growth that returns every single open is worth a cache clear and a check that the phone's date is right, since a failing secure connection can leave the app retrying downloads.

Clear cache or clear data

Both buttons live at Settings, Apps, MMY, Storage, and they do different jobs.

• Clear cache drops temporary files and partial downloads. The login stays. Use this after a stalled first launch, after an update that left the app sluggish, or when you simply want the space back.
• Clear data wipes the app's local store. The login goes with it, and the next open behaves like a fresh install: assets download again, and you sign in again. Use it only when you mean to start over on this phone.

If the settings list shows two entries named MMY, you have both builds installed. Clearing one does nothing to the other. Match the entry to the app you use before you tap either button; the two builds page shows how to tell them apart.

What not to delete by hand

The Android/data folder for the package holds the same store the Clear data button manages, and removing it by hand has the same effect as that button. There is no separate folder of "just the games" you can prune to save space while keeping the session. Cache is the safe reclaim; anything deeper logs you out.

Moving photos or downloads off the phone is the right way to free a partition that is genuinely full. Uninstalling and reinstalling the app also frees the space, at the cost of the local session, which the uninstall page covers.