According to a recent discussion on the Swedish Facebook site 'Vår Skådarvärld' NO Android version is under production, nor is it planned. The current IOS app is produced by Touchpress (www.touchpress.com) and it's quite evident from correspondence with them by members of 'Vår Skådarvärld' that neither Touchpress or the publishing house of Bonniers produce apps for Android.
// Jonas
Thank you for this very helpful input.
Looking at the Touchpress site makes it clear that this firm is Apple only. So if, as seems very likely, Touchpress has an exclusive with Bonniers on the Collins guide, there is no prospect of an Android version, unless someone else buys the rights from the current owners.