I just created a new app (with permission from Riot and all), which is used to keep track of the enemy summoner cooldowns but as a team.
For example, I see Lux use flash and I start a timer, everyone in my team who uses the app sees that same timer going down.
So it enhances the communication about enemy summonerspell cooldowns
The Beta version is completed now and I am actually looking for people to use it and give me some feedback.
It's already in the Google Playstore: https://play.google.com/store/apps/details?id=com.hughes.wecount
It's an Android app now and will go to IOS in the future (if people like it).
It just needs your summonername to be used
If you have any questions or tips, here's the twitter account for the app https://twitter.com/WeCount7