Hivoe is a great product. I started using the free version and changed to the paid after reaching more than 100 followers on Twitter. It's easy to use and especially the 'sending an auto-DM to new followers' feature is awesome. The engagement rate is pretty high and it saves me time writing to new followers and in return starts a lot of interesting conversation with interesting people.
What's great
easy to use (1)free version (1)saves time (1)auto-DM to new followers (2)engagement rate (1)
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