The Hornady 4DOF is set up best for the Hornady bullets so trying to use it for others will probably be off a little. Used with Hornady bullets it's very close as it was built around their doppler testing of their bullets. There are always going to be slight differences between any program and what you actually shoot due to conditions and also not all scopes track 100% on but if using Hornady bullets the 4DOF is an excellent choice and works well.
There is a mobile version in the works. Not sure when it will be out though.
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