Duplify ‑ Duplicate Store

I used this app to duplicate my theme, collections, products, etc. to another account and it did so more or less to perfection. There was an issue exporting my theme because it surpassed Shopify's 20MB limit over their API but before I could even write to their team to notify them of the issue, they had already emailed me to let me know they were aware of the problem and would export it manually. After a few minutes they notified me it was done and after checking my theme was installed perfectly. Stellar customer service and very well-working product. Would totally recommend.