Use to be a great App – Sputnik! Review

I have used Sputnik for several years. It was great to know when an Iridium flare would be visible. They are amazing to witness. Also when the HST or ISS would make an appearance. However, now Sputnik no longer charts when the Iridium flares will appear. Only the HST & ISS are listed. The last revision of the App was about mid 2018. Sadly, it appears that Sputnik has been abandoned by its creator. Now, I rarely use it, as most of the transits of the HST & ISS are so faint at my location to observe.
Review by Tech Bear on Sputnik!.