Perhaps you downloaded a app that saved a lot of cache, for example soundcloud downloader, the app doesn't save songs just cache which overheats iPhone...
Sent from my iPhone 5 using Tapatalk. . .
Sorry, that statement is misleading at best. Because if that was true Google Play Music , Amazon Music and Apple Music, which all use caching to play music, would all overheat the iPhone and you would see millions of complaints on forums every where. Guess what, there aren't that many people complaining. There's a reason why.
Lets chat about what truly overheats an iPhone. And what's really funny is, the list is actually very small. Ready?
1) Battery usage.
Yep. That's it. Now while some of you might think I am being a smart *bleep*, please take the time to read why I'm typing this up. It does make a lot of sense once you look at the whole picture.
First lets all remember one fact. The iPhone is a one piece deign. That means every single component, that makes up the iPhone, is encased in a housing that you hold. So lets list the top 5 battery users in an iPhone.
1) Screen
2) Cellular Radio
3) GPU
4) CPU
5) WiFi
Does the screen generate a lot of heat? Not really. In fact if you took the battery, removed it from the case and and turned the brightness to 100% the iPhone would stay cool to the touch because it would dissipate the heat into the air very quickly. Now the battery on the other hand would be getting warm. But because it is outside the case, it to would dissipate its heat pretty well as well. But put the two in the same housing. Now you have heat soaking occurring.
See where this is going? Cellular Radio, GPU, CPU and WiFi all start to add up when it comes to heat soaking with the battery being right next to all of these components. Now, why doesn't a caching MP3 player overheat an iPhone?
Well first it sends the whole song to the iPhone while it is playing it. That causes the Cellular Radio (or WiFi) and CPU to use battery which generate heat in all three. But that download only last for 10 to 30 seconds. The average song is 3 minutes and 30 seconds. So for 3 minutes the Cellular Radio is in standby mode. It's no longer draining the battery and generating heat. The screen is probably off. Another savings on draining the battery which as we know means a savings on heat. So that leaves reading the on board memory for the music, which generates almost no heat as well as the CPU to decode the MP3 and then sending the result to the speaker/headphones/bluetooth. Those last three items aren't big heat generators either.
So is it possible for "soundcloud downloader" to overheat the iPhone? Yes. No doubt in my mind. But odds are the screen is on and set at 50% or brighter. The application is downloading multiple songs simultaneously, playing one back and the app is using the cellular radio the entire time. Well after 20 minutes that a lot of heat soaking with no ability to cool down. Guess what, play a 3D game on the iPhone for 20 minutes solid and it does the same exact thing save for only the CPU/GPU and screen are in use.
With that all in mind, now you see why I said the original statement is misleading. The app isn't the issue nor is the caching. But if you reach a very specific set of circumstances, then maybe it could be an issue.
