I used this app but when they do upgrades they remove the features you are using and then make them add ons you have to buy.
Also if you buy add ons you lose them with upgrades and have to buy them again at higher prices than you originally paid for them. I recommend just using the official gmail app and log in and out if you have to, youll save a lot of headache.
free2worship about iMailG, v10.5.6