I can read with an iPad no problem. I use Bluefire Reader as it's the best app for reading ePub. There is an Android version.
Since you have a Kobo and that uses ePub, there's no reason to use the Kindle app. Use Bluefire and you can both read the same eBooks. Bluefire supports library eBooks and the same DRMed eBooks your Kobo can display.
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