while ios and android offer more and more deep api to securely managed a mobile device and integrate into enterprise – apple utilize restrictions to natively separate managed from unmanaged content – android buildin work container on every device to secure enterprise data – both offer enrollment program to easiely intergrate the devices to management system
but there a argument to not rely on device management api – ios lack unfinished restriction of unmanaged/managed data, it is possible to bypass limitation under certain conditions – android depricated existing device admin feature in favor of android enterprise technology, but new container ui/ux isn’t consitant between different os releases and lack of some existing features, e.g. private/business calender overlay
privacy is a main point to offer a byod solution for your employees, ios managed devices could report your installed app and fully wipe even your private data (until user-enrollment was released), android enterprise addressed this from the very first, apple introduced user-erollment to address privacy concerns for byod deployments
usablity is the other big point to address for your users – while apple provide the ability to use business data within ios native applications, android lack of a consistant look and feel between os releases and different management api, batch icons differ at different releases and espesially samsung devices – to ease support provide the same email app across both mobile os
mobile application management also named non-MDM managed your data within an app or a entire framework, the app is’t capable to control your device, e.g. to enforce device pin or encryption – major mdm vendor like airwatch, mobileiron, blackberry formerly good and citrix provide a framework to secure your data over serveral productivity apps, without the need to rely on device api
microsoft offer with it’s office 365 apps the capability to secure business data with app protection policies without the need to enroll your device to a unified endpoint management, 3rd party mdm could optinally integrate these features with graph api
when it comes to enterpise integration with full device vpn support, certificate authentication or kiosk (single use) devices there is no way around a uem solution
don’t be a fool, select your prefered solution, based on the requirement for each usecase