Added info about the built-in currency formatter (iOS)

1 files changed, 12 insertions, 0 deletions

diff --git a/design-documents/051-fractional-digits.rst b/design-documents/051-fractional-digits.rst
index 99929f30..21930d1b 100644
--- a/design-documents/051-fractional-digits.rst
+++ b/design-documents/051-fractional-digits.rst
@@ -32,6 +32,12 @@ Usually, all these three numbers have the same value, which means that in case o
 cent/penny values (but not a fraction of those), these cents/pennies are always shown (even if they are 0) as two normal digits
 after the decimal separator, and fractions of a cent/penny are rendered as SuperScriptDigits, but only if they are not trailing zeroes.
 
+iOS has a built-in currency formatter, which knows how to deal with thousands-separators and where to apply them
+(e.g. India uses a mixture of hundreds and thousands instead of putting the separator after each 3 digits like western currencies).
+However, this formatter will round after two (or three) fractional digits and thus cannot be used for the whole amount.
+
+(please add information about Android and WebEx here)
+
 
 Proposed Solution
 =================
@@ -46,6 +52,12 @@ Proposed Solution
           let isCurrencyNameLeading: Bool             // true for “$ 3.50”; false for “3,50 €”
       }
 
+For iOS, we plan to format the integer part of the amount with the built-in currency formatter, then add the fractional part
+according to this document.
+
+(please add information about Android and WebEx here)
+
+
 
 Definition of Done
 ==================