Personally, I'm curious why you didn't simply go with a reputable Android device manufacturer if you wanted long device life and integration with Windows. iOS isn't really known for integration with anything but itself. They have some flexible APIs in place, but you are limited in so many ways and the OS is so complicated (strange to say, but many tasks that should be simple have complex workarounds—iOS is only getting basic integration features Android has had for years, and they're not nearly as comprehensive as of yet) that it can cause issues across platforms.
Take the Moto X. Google directly updates Google Play Services and all the major system apps through the Play Store. 90% of features come through these venues, and devices that are years old get many of THESE features. Google Play Services goes pre-Gingerbread, if I'm not mistaken. That's old.
Even considering that, Motorola has a fantastic record of OS updates as of late, and the software optimization is top-notch. Faster in real-world use and more reliable than iPhone. If you don't trust Motorola, go Nexus.
Although you would sacrifice the fantastic hardware Motorola has been building, you still get a great device.
Intents let you send almost anything to any app (be it OneNote or OneDrive), including from a file manager. iOS8 has a similar feature, but that's iOS8; developers need to support it, and that's going to take a LONG time to see reasonable adoption. Still lacks Android's deep level of integration.
The iPhone is an absolutely fantastic device, fast and well-built with a solid featureset, but IMO it is quite limited for what you're aiming to do and you can achieve more for less with a different platform. I probably won't change your mind, but it simply isn't the best device for your purposes in my opinion. If you had a Mac, maybe.
I won't talk about email, but the stock Android Email client is one of the best around, and supports Microsoft email accounts quite well. You can always change the default client to any you want, unlike iOS. You're stuck with what you have, which isn't necessarily bad.
Take the Moto X. Google directly updates Google Play Services and all the major system apps through the Play Store. 90% of features come through these venues, and devices that are years old get many of THESE features. Google Play Services goes pre-Gingerbread, if I'm not mistaken. That's old.
Even considering that, Motorola has a fantastic record of OS updates as of late, and the software optimization is top-notch. Faster in real-world use and more reliable than iPhone. If you don't trust Motorola, go Nexus.
Although you would sacrifice the fantastic hardware Motorola has been building, you still get a great device.
Intents let you send almost anything to any app (be it OneNote or OneDrive), including from a file manager. iOS8 has a similar feature, but that's iOS8; developers need to support it, and that's going to take a LONG time to see reasonable adoption. Still lacks Android's deep level of integration.
The iPhone is an absolutely fantastic device, fast and well-built with a solid featureset, but IMO it is quite limited for what you're aiming to do and you can achieve more for less with a different platform. I probably won't change your mind, but it simply isn't the best device for your purposes in my opinion. If you had a Mac, maybe.
I won't talk about email, but the stock Android Email client is one of the best around, and supports Microsoft email accounts quite well. You can always change the default client to any you want, unlike iOS. You're stuck with what you have, which isn't necessarily bad.