Harry Guinness is a writer and photographer from Dublin, Ireland. His writing has appeared in the New York Times, Lifehacker, the Irish Examiner, and How-To Geek. His photos have been published on hundreds of sites—mostly without his permission.
Harry Guinness
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More from Harry
App tips
OpenAI models: Every model and what it's best for
This is your complete guide to all of OpenAI's major models. We'll look at what each one is good for, how much they cost, and how to make the most of them in your work.
By Harry Guinness
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7 min read
App tips
What is the A2A protocol?
with the newly announced Agent2Agent (A2A) protocol, Google is trying to help bots be more productive members of society. Learn more about the A2A protocol.
By Harry Guinness
•
4 min read
Best apps
The 5 best calendar apps for Mac in 2025
Calendars don't need to be complicated—a paper planner can do the job, after all. The best calendar application combines the timeless simplicity of paper calendars with advanced features that make it even easier to keep track of appointments.
By Harry Guinness
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13 min read
Best apps
The best Docusign alternatives in 2025
If Docusign isn't the right fit for you, here's a big list of some Docusign alternatives you can use instead.
By Harry Guinness
•
11 min read
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