Week 1 the app opened in about 2 seconds on my 2020 Android handset. By week 7 it opened slowly, ran warm and buzzed at me 3 times an evening. Nothing inside that Sunwin app download had changed, which is exactly what made the 7 weeks worth logging.
The 4 changes between week 1 and week 7
My notes app holds 31 sessions across 7 weeks on 1 handset. 1 phone is an anecdote rather than a test, so read it that way.
The 4 things I noticed, in the order I noticed them
Not 1 of these appeared on day 1. They arrived separately, weeks apart, each one small enough to shrug off on its own.
- Notifications first, starting near week 3 and clustering into the evening hours
- Storage next, which by week 5 held far more than the file I installed
- Launch time after that, slower in a way I felt before I measured anything
- Heat and battery last, obvious by week 7 after 20 minutes at a table
What my notebook actually recorded, week by week
The Sunwin app download itself never changed; the 4 lines below did.
- Week 1: opened in roughly 2 seconds, notification tray sitting empty
- Week 3: first cluster of promotional alerts, 3 of them in a single evening
- Week 5: storage entry clearly larger than the package I had installed
- Week 7: handset warm after 20 minutes, app high on the battery screen
What I got wrong before I understood what was growing
I blamed the wrong things for a month. That cost me 2 reinstalls, 1 lost login and a fortnight of low-grade irritation.
2 reinstalls that fixed nothing and cost me a login
My first move was the obvious one: remove the app, repeat the Sunwin app download, sign in again. It helped for roughly 4 days both times. What I had really done was wipe cached data as a side effect, without noticing that the wipe was the part doing the work. The second reinstall also lost a saved login, and recovering it took a support message and 2 days. A page such as SUNWIN shows you the current build; it says nothing about what 7 weeks of use leaves behind.
Why I blamed the network instead of my own handset
A slow launch feels like a connection fault, so I tested the connection. I switched between home wifi and mobile data, restarted the router twice, and once sat in a cafe to rule out my flat. Every test came back fine, which should have told me something and did not. The battery screen had been reporting the answer for 3 weeks by then, sitting 3 taps deep in settings where I never looked. None of it had anything to do with the Sunwin app download itself.
What my Sunwin app download grew into by week 7
Storage was the largest change and the easiest to miss, because the number lives several screens deep in the settings menu.
Where the space went, as far as I could tell
I cannot see inside the app, so this is inference from the app storage screen rather than measurement. The entry splits into the installed package, app data and cache, and only the first of those stayed still. A Sunwin app download installs a fixed package; everything after that is accumulation. What I could see growing fell into 3 groups.
- Images and table artwork kept after each visit to a lobby
- Session and log files that nothing on my phone ever cleared
- Stored preferences and history that survived every app restart
What clearing the cache actually changed for me
Clearing cache on 2 occasions in week 6 and week 8 returned the launch to something close to week 1, and it kept my saved login both times. Clearing storage went further and signed me out. The honest result is modest: the phone felt new for about 5 days, then the same climb started again. Nothing I did stopped the accumulation, because accumulation is how the app is meant to work.
Notifications, battery and heat across the same weeks
The other 3 changes were easier to measure than storage, and 2 of them turned out to be things I could switch off entirely.
The notification tray and 7 weeks of accumulation
By week 5 the push notifications arrived on most evenings, and none of them carried anything I needed. A Sunwin app download asks for that permission during install, and I had granted it without reading the line. Switching promotional alerts off in the system settings took 40 seconds and stopped the lot, while leaving account messages alone. That was the single best change I made across the whole period. I only found it because I opened the app’s permission page looking for something else, which is not a method I would recommend to anyone.
What the battery screen showed after 20 minutes
I have no proper instruments, only the system battery screen and the back of the phone against my hand. Battery drain over a 20 minute session moved from unremarkable to the top of that list. A lobby page such as SUN WIN loads in a browser without any of this. 3 rough readings sit in the notebook.
| What I watched | Week 1 | Week 7 |
| Launch to lobby | About 2 seconds | Nearer 5 seconds |
| Evening alerts | None | 3 on a busy night |
| Phone after 20 minutes | Normal | Noticeably warm |
Week 8, same phone, a shorter routine
Nothing here was a fault. A Sunwin app download from week 1 behaved in week 7 the way any app behaves once it has cached a few hundred screens. My mistake was reinstalling instead of reading the storage line. The routine now runs to 2 items: alerts off permanently, cache cleared when the launch starts to drag. 1 caveat belongs on all of it. This is 1 handset, 31 sessions and no measuring tools. A Sunwin app download taken from outside an app store also carries no store review and no automatic update, so the clearing up stays manual. The phone told me for 3 weeks. I was looking at the router.