I will say it was usually spot on for pike.
I love seeing guys think outside the box. I haven't used any fishing apps but I do have a waterproof pouch for my iPhone made by aquapac. I paid 20 bucks for it on ebay and my phone doesn't go near the water without being in it. I tested it in the tub with an old camera. It's totally submersible and if you seal it with some air in there it will float. I gained so much confidence in it I took my iPhone in the pool.
I love seeing guys think outside the box. I haven't used any fishing apps but I do have a waterproof pouch for my iPhone made by aquapac. I paid 20 bucks for it on ebay and my phone doesn't go near the water without being in it. I tested it in the tub with an old camera. It's totally submersible and if you seal it with some air in there it will float. I gained so much confidence in it I took my iPhone in the pool.