What is the best POS for a small shop or duka in Kenya?

For a duka the worry is usually cost and complexity, not features. The honest answer is that a small shop does not need a heavy supermarket system; it needs the basics done reliably: ring a sale, take M-Pesa, issue a compliant invoice, and know at the end of the day what actually came in.

The free terminal removes the upfront hardware cost that puts most small traders off, and offline-first selling means a dropped line never stops a sale. Because billing is month to month with a money-back guarantee, you can run your real sales through it first and only keep going if the daily figure earns its keep.