They is no apps all channel is working. Check for 魔力 and 高清 tab. This two mostly work.

Basically I know who is the creator of this apps and the source it's using, at the mean time watch while it is available. If you want a more stable one, don't be so cheap skate fork out some $$ to subscribe.

I just realised that majority of the time, the lagging in using iptv, is actually due to the iptv service provider/source.

I compared between 3 scenarios.

Using YouTube - no lag whatsoever up to HD
Using payed iptv - really really minimal lag/sangkut
Using free iptv - lagging like there's no tomorrow until feel like throwing the box into the sea.

Btw I'm using Internet with 8mbps speed.