I've had this feedback a few times. Others have said they paid more to support the app rather than for the extra features.

One question - do you translate many multi-word phrases? If you do then you would find the free plan restrictive. If you mainly translate single words then the free plan is probably fine.

May consider restricting the free plan a bit more in future. For now I'm happy to have a lot of free users to help spread the word and grow.