You know what would be lovely? If I had a list of what levels unlocks the ability to use a new appliance.
I know I unlock the use of 5 appliances at Level 14, and 6 appliances at Level 19.
I realize you can buy the use of another appliance for 24 Gems at any time, but it'd be nice to have a complete list of what levels unlock the ability to use another appliance for those who don't want to spend USD on Gems. ^_^
So, starting out:
2 appliances = Level 0 (or 1?)
3 appliances = Level 4 (?)
4 appliances = Level 9 (?)
5 appliances = Level 14
6 appliances = Level 19
7 appliances = Level __
8 appliances = Level __
9 appliances = Level __
10 appliances = Level __
11 appliances = Level __
12 appliances = Level __
13 appliances = Level __
14 appliances = Level __
15 appliances = Level __
16 appliances = Level __
17 appliances = Level __
18 appliances = Level __
(I've heard that there's an 18-appliance maximum, at least for those who don't want to pay gems.)
I do believe we're given 2 appliances when we first start, at either Level 0 or 1, if I recall correctly.
Judging by the fact that there's a 5-level difference between Levels 14 and 19, which I do know for sure unlocks the use of 5 and 6 appliances, I guesstimated that the 3 and 4 appliance usage was at Levels 4 and 9 (because I don't remember :P).
Or must I assert that you unlock the ability to use another appliance every 5 levels you complete?
Regardless, let's add to this list, please!