I know back in the day, you could purchase the Wahoo Fitness Key to get ANT+ data on an iPad or iPhone with any of the various bike training apps.
What’s the current options (if any) available these days? I’ve got a Powertap hub in my rear wheel. Use an ANT+ stick to run Zwift/TrainerRoad/whatever on my computer, but I’d like to use the same apps on an iPad.
I have the cable unit you referenced and it works fine. No complaints. My garmin heart rate monitor died so I picked up a 4iiii heart rate monitor and it acts the same as the cable unit as an ant+ to Bluetooth converter with the added plus of a heart rate monitor and a data logger. Never an issue with either.
If you have one of the old Wahoo Fitness Keys (or can buy one one eBay) and a 30-pin to Lightning adapter (I have an Apple original, but there are knock-offs on Amazon), then I beleive it still works. I used mine to recalibrate an old Quarq power meter recently.
I also have the Cable. It works like a champ to pair the Quarq (ANT+ only) with a Polar watch (BLE only).
Edited to add: The 4iiii Viiiiva heart rate monitor will also translate from ANT+ to BLE just like the Cable.