Ovia vs glow

So my last cycle was 48 days long. That was a first time for me but now glow has it saying that I won't ovulate till the 24th of April and has my cycle set to be 34 days long...but ovia says the 18th is ovulation and my cycle is the normal 28days. I don't want to miss ovulation. Which should I trust more? I don't buy ovulation tests but I'm tempted.