Solid as mountain rock...

And I know because I had the rare opportunity to put this app head to head against its yellow faced competitor in the mountains.

Doesnt seem to burn data in either mode (tested in airplane mode) and registered quickly (the 2 modes varied by ~2m as indicated)

The graphics are on theme and totally cool and complimentary. The added home screen info (map access and Lat. & Long.) were welcome and not intrusive.

The only niggle would be to use some more vertical blank space by elongating the numbers and soften the shadows for increased legibility. We were on the move and could only briefly glance at the screen. The competitor (whose name shall not be mentioned) was more legible EVEN though it had a smaller type size.

This is only an issue at high speeds with turbulent bump - but it would also tighten up the interface a little especially given that iPhone 5 has even more real estate than my 4s.

( For all I know, they will add more data to the home screen because of the extra i5 real estate - just please dont put banner ads there!)

Really a 4.5/5 but we cant award 1/2 stars so a niggle costs a whole point!

Irrelevantbutastute about Altimeter+, v1.6