Suggestions on PO and Forecasting App

I really don't like the native PO on shopify, and Stocky is going to be gone soon so I don't want to learn Stocky and have to re-learn another app.

Can you guys share what PO/Forecasting Apps you use at your store?

I really need these functionalities:

-Multi-location supported

-Create PO by vendor, with forecasting and showing "sold in last X days or weeks" figures to know how much quantity to reorder to replenish.

Inventory Planner seems like a good choice but their pricing is custom and for my store, it seems a bit ridiculous. Any alternative suggestions?