5 ms·

it's in iPhone 4S, but it drains your battery like crazy

jaxn 15y ago
Why do you say it drains your battery like crazy? I am not saying it doesn't, but I haven't noticed it. Doesn't iOS now have a location service that will update apps of your location without running the app constantly in the background?
- incremental 15y ago
  Yes, that was part of the multi-tasking model rolled out in iOS 4.
- jcurbo 15y ago
  The location based reminders use cell phone tower-based location, not GPS. Since your phone is constantly polling cell phone towers anyway, it shouldn't use more battery than usual, unless it forces the phone to poll towers more frequently. (I'm not sure of the implementation details) I personally have not noticed more battery drain than normal on my 4S.
- glhaynes 15y ago
  Yeah - lots of people are saying they're having worse battery performance on the 4S or iOS 5 (lots of people aren't, too), and then lots of those people are claiming lots of different things such as turning off various features (and also not doing anything different at all!) has dramatically helped. In other words, essentially no science is being done and no one to my knowledge can say anything definitively yet, but lots of folk remedies are being tweeted. Assuming there's not a bug in the geofencing code, it shouldn't use too much more battery at all because it only goes out to the GPS when available cell towers—which are being constantly communicated with anyway—change.
  - hartror 15y ago
    I am getting way better battery performance that I was getting on my 2.5yo 3G with iOS4 that I upgraded from so I am yet have an issue with it.
ja2ke 15y ago
Location based reminders are a feature in iOS 5 across all phones. My vanilla 4 can do it, so presumably my old (and iOS 5 supported) 3GS can too. Siri itself is the only (big?) iOS 5 feature that is hardware locked to the 4S.
- AGorilla 15y ago
  FYI I was using a 3GS with iOS 5 for a few days before I got the 4S and location based reminders are not available for it.

jaxn 15y ago

Why do you say it drains your battery like crazy? I am not saying it doesn't, but I haven't noticed it. Doesn't iOS now have a location service that will update apps of your location without running the app constantly in the background?

incremental 15y ago
Yes, that was part of the multi-tasking model rolled out in iOS 4.
jcurbo 15y ago
The location based reminders use cell phone tower-based location, not GPS. Since your phone is constantly polling cell phone towers anyway, it shouldn't use more battery than usual, unless it forces the phone to poll towers more frequently. (I'm not sure of the implementation details) I personally have not noticed more battery drain than normal on my 4S.
glhaynes 15y ago
Yeah - lots of people are saying they're having worse battery performance on the 4S or iOS 5 (lots of people aren't, too), and then lots of those people are claiming lots of different things such as turning off various features (and also not doing anything different at all!) has dramatically helped. In other words, essentially no science is being done and no one to my knowledge can say anything definitively yet, but lots of folk remedies are being tweeted. Assuming there's not a bug in the geofencing code, it shouldn't use too much more battery at all because it only goes out to the GPS when available cell towers—which are being constantly communicated with anyway—change.
- hartror 15y ago
  I am getting way better battery performance that I was getting on my 2.5yo 3G with iOS4 that I upgraded from so I am yet have an issue with it.

ja2ke 15y ago

Location based reminders are a feature in iOS 5 across all phones. My vanilla 4 can do it, so presumably my old (and iOS 5 supported) 3GS can too. Siri itself is the only (big?) iOS 5 feature that is hardware locked to the 4S.

AGorilla 15y ago
FYI I was using a 3GS with iOS 5 for a few days before I got the 4S and location based reminders are not available for it.