I am customizing my home screen quite thoroughly and I have many pinned tiles on my home screen now. I am wondering if there is some limit on the number of pinned home-screen-tiles.
I assume you are talking about a hard limit, and not a practical limit, right? I have yet to read or talk to anyone who has noticed a hard limit. That being said, I imagine there is one. The bigger question is what comes first, the hard limit or the practical one?
Can you honestly, truly use your phone with 50 live tiles? Do you really need every contact pinned? Every application?
So, I can't exactly answer your question other than speculating. Perhaps myself or someone else can get in touch with a developer on the Windows Phone team and get a more solid answer for you. In the mean time, if you run into this problem please share :)
I found an article that mentions there is an unlimited number of tiles you can pin, but I don't see a reference for it. This still leaves the practical limit though.
I just found this guy who claims to have 75+ applications pinned.
I think I approached this answer semi-wrong. Although it seems like there isn't a hard limit (or one anyone has run into with over 100 tiles) there is a limit on notifications. You can only have 15 3rd party applications that subscribe to notification. So you can pin many, many tiles, but only 15 of those will update, per-say.
If you want the full details on the "15 app limit" You can view the official blog post here. In short:
Yes, the limit is fifteen third party applications can be concurrently subscribed to receive push notifications (whether that is a live tile or toast). Parsing it out, the applications that come out of the box (like outlook, people hub, etc.) will not count towards this limit. So there is no limit on 15 live tiles. You can have 20+ if you add it up (that is about 2.5 screens worth of tiles on star menu)
An application is only counted if it has push notification or tiles push enabled and is subscribed to a channel. If you install an application but you do not enable push, it would not count towards the limit.
You should not have to go uninstall an application in order to free a slot. If an application is coded well, it should be prompting users and giving them the option on whether they want to use push notifications and/or live tiles (since there is potential bandwidth charges from the operator when these are pushed). if the user never agrees or it unchecks the box to subscribe, the application should free the channel; there fore uninstall should not be required.
Applications that use just scheduled tiles updates do not count towards the limit. If that is all you need be a good citizen and
If an application subscribes for tile updates, and is never pinned it unfortunately does count. Again, we count the channels.
Why is there a limit? The usual thrive to ensure there is a great user experience, good battery life, quality of service on back-end and front-end, bandwidth (cost) , etc. Limit will increase as we get right data on how people use push, impact, etc. Kevin’s feedback on there not being an API to enumerate all push apps is still valid. I know the product team has heard it (from Kevin, me and others) so I hope that gets addressed or the limits go high enough that the problem becomes a moot point.