Are there any apps which will allow local calling using data only that do not require any special numbers called out initially and does not require the receiver to have a similar app or account?

Question

Are there any apps which will allow local calling using data only (not minutes, no extra charge) that do not require any special numbers called out initially and does not require the receiver to have a similar app or account?  Just for random local calling.

Answer 1

Yup.
Here is a way you could solve this by adding an extra column and a small lookup table:
The lookup table is here for the copying:
0
1
k
kilo
2
M
mega
3
G
giga
4
T
tera
5
P
peta
6
E
exa
7
Z
zetta
8
Y
yotta
In table 8 (the one on the left in the image) column A is where the values are. 
B1=A1÷(1024^VLOOKUP(INT(LOG(A1, 1024)), Binary Prefixes::A:D, 1))&" "&VLOOKUP(INT(LOG(A1, 1024)), Binary Prefixes::A:D, 2)&"B"
this is shorthand for... select cell B1, then type (or copy and paste from here) the formula:
=A1÷(1024^VLOOKUP(INT(LOG(A1, 1024)), Binary Prefixes::A:D, 1))&" "&VLOOKUP(INT(LOG(A1, 1024)), Binary Prefixes::A:D, 2)&"B"
select cell B1, copy,
now select all the cells in column B, paste