Although iPhones are very popular with mobile users, the market share of Android gadgets is much larger. Therefore, signNow offers a separate app for phones running on Android. Easily find the app on the Play Market and install it to sign your key agreement form by e-signature. If you have an iOS device like an iPhone or iPad, simply create electronic signatures for signing a key contract form in PDF format. signNow has paid special attention to iOS users and has developed an app especially for them. To find it, go to the AppStore and enter signNow in the search field. If you need to share the key agreement form with other parties, you can email the file. With signNow, you can sign as many papers a day as you need at an affordable price. The whole process may take a few seconds.