Earmaster Vocal Trainer

[cclarry]

$14.99 - no extra discount

https://www.jrrshop.com/earmaster-vocal-trainer

[Eusebio Rufian-Zilbermann]

Also at dontcrack, discounted if you do a custom bundle (buy multiple products in a single purchase, get 5~20% off each product)

https://store.dontcrack.com/product_info.php?manufacturers_id=174&products_id=4261

http://store.dontcrack.com/specials.php

[Yan Filiatrault]

Also available in the iOS app