What are some alternatives?
When comparing Air Sharing and Postman Collections, you can also consider the following products
CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.
DreamFactory - DreamFactory is an open source REST API backend for mobile, web, and IoT applications.
Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
Paw.cloud - Paw is a REST client for Mac.
AltaMail - A treasure trove of features make AltaMail the best email App for iPad or iPhone for auto reply, auto filing, managing and saving emails, attachments and other files.
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.