I use the Auto Stamper app which is 99% reliable with an Android phone.
However, when it does let me down, for whatever reason, I use ‘batchphoto.com’ where you can add a stamp to any number of photos that have been missed.
Hi FizzyDog,
You seem to have cornered the market!
I’d be grateful if you would send me your photo template please. Richard@jadeinventories.co.uk
Many Thanks
Richard Griffiths