PureFlow 4+

Only started using this a couple of weeks ago, but I'm hooked, it makes generating flowcharting very simple but very professional, only downside is that it does not allow right angled lines to join shapes, but I got over this by using the smallest circle available as a corner item, and it looks ok.
It does not have a great folder system to keep your charts in categorised area's, as all charts go either into your local folder or a cloud folder.
On the whole though, considering it's totally free, with none of your 'in app purchases' restrictions, it's well worth using.
If these issues were addressed, it would have been 5 stars.

I can not think of a single thing I would change about this app. It is simply perfect.
I work for a software company and use it to quickly put together user-flows.
It has made my job quicker and easier, particularly given I can export (via a number of methods and in a number of file formats) the diagrams incredibly easily.
If you need a flowchart app stop looking and get this. Do not waste your time or money on anything else.

Great simple little app - but sadly the app development has not evolved since 2014, so I wouldn't expect any tweaks or updates any time soon. Shame.
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Old review:
Surprisingly this is rather good! I wasn't expecting much and even with the small in-App upgrade to export, this simple yet highly intuitive and amazingly functional flow chart app hits the spot. It does a simple job, well. Granted there are some updates needed, such as the ability to move whole blocks of text, edit properties, etc but in the meantime enjoy a well designed and well implemented app. Thanks.