I bought this app to download and view temperature and pressure data from my D3 Drop. The app works very well when downloading the data from the logger, but the app offers limited control over display units (imperial or metric) and more importantly, pressure and time scales. The pressure plot always shows as a horizontal line, regardless of daily pressure variations, because the display scale is fixed at 29 to 32 inHg. This range scale is fine when a hurricane passes through, but useless for daily/weekly variations. Of course I can (and have) export the data to my phone or laptop, then plot using database software, but this defeats the reason to have the app plot the data. So two stars overall - good for downloading data from the logger, but useless for plotting that data.

I am really happy with the Drop D3 for my needs. I am using it on backpacking trips to keep a log of temperature changes overnight. Having an app in my phone to visualize the log is great. Unfortunately, the app leaves a lot to be desired. It is very buggy. It has layout issues in various phone sizes. It has issues with crashing when data is cleared on the device. It has state management issues with some of the custom UI elements. I would give the Drop D3 five stars and the app one star. I looked on the Kestrel web site to see if they published an API guide for the device. I couldn’t find one. I would love to build a custom iOS app for this device. How about it?

I love the D3, wish I could say the same about the app. Dashboard wastes most of the screen with massive black blobs only allowing 3 different sensor readings. A better layout would allow easy viewing of all readings. On my iPhone X, the icons at the bottom of the screen interfere with the iOS swipe up making them very difficult to access. There is only a single setting for imperial or metric views. There should be a setting for each sensor. For example I’d like to view temperature in Fahrenheit, density altitude in feet, and pressure in millibars. Come on Kestrel, you can do better than this!

Needs updating. Specifically for supporting newer devices such as iPhone XS and iPad Pro. Developers: Unfortunately, if you’re going to offer an app for iOS devices you need to accept the fact you will need to maintain and update it. This is not something you can set up and forget it. The functionality of connecting my device to iOS devices was certainly a factor when making my purchases. Now that it’s become clear the app is lacking even basic maintenance and updates I am becoming frustrated with my purchase.