What is the difference between the two in-app purchases?

The technical difference is negligible, both In-App purchases remove the ads forever. The more expensive option also gives you a nice illustration in the settings menu.

But for us the difference is huge. Not because we get an additional Dollar, more because we see this as real appreciation of our work.
We are a small team of independent developers and designer who spent a lot of time to create this app. Although we are doing this for the love of Wikipedia, your money helps to continue developing great apps.

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