diff --git a/src/collections/human.js b/src/collections/human.js
index 5ddab4c..98aa27f 100644
--- a/src/collections/human.js
+++ b/src/collections/human.js
@@ -17,77 +17,77 @@ const getStylesForColor = color => ({
     fontSize: 34,
     lineHeight: 41,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(34),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(34) : undefined,
     color: colors[color],
   },
   title1: {
     fontSize: 28,
     lineHeight: 34,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(28),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(28) : undefined,
     color: colors[color],
   },
   title2: {
     fontSize: 22,
     lineHeight: 28,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(22),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(22) : undefined,
     color: colors[color],
   },
   title3: {
     fontSize: 20,
     lineHeight: 25,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(20),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(20) : undefined,
     color: colors[color],
   },
   headline: {
     fontSize: 17,
     lineHeight: 22,
     ...systemWeights.semibold,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(17),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(17) : undefined,
     color: colors[color],
   },
   body: {
     fontSize: 17,
     lineHeight: 22,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(17),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(17) : undefined,
     color: colors[color],
   },
   callout: {
     fontSize: 16,
     lineHeight: 21,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(16),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(16) : undefined,
     color: colors[color],
   },
   subhead: {
     fontSize: 15,
     lineHeight: 20,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(15),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(15) : undefined,
     color: colors[color],
   },
   footnote: {
     fontSize: 13,
     lineHeight: 18,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(13),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(13) : undefined,
     color: colors[color],
   },
   caption1: {
     fontSize: 12,
     lineHeight: 16,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(12),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(12) : undefined,
     color: colors[color],
   },
   caption2: {
     fontSize: 11,
     lineHeight: 13,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(11),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(11) : undefined,
     color: colors[color],
   },
 });
diff --git a/src/collections/iOSUIKit.js b/src/collections/iOSUIKit.js
index 4d59b12..e83f676 100644
--- a/src/collections/iOSUIKit.js
+++ b/src/collections/iOSUIKit.js
@@ -14,19 +14,19 @@ const getStylesForColor = color => {
     largeTitleEmphasized: {
       ...human[`largeTitle${colorSuffix}Object`],
       ...systemWeights.bold,
-      letterSpacing: Platform.OS === 'ios' && 0.41,
+      letterSpacing: Platform.OS === 'ios' ? 0.41 : undefined,
     },
     title3: human[`title3${colorSuffix}Object`],
     title3Emphasized: {
       ...human[`title3${colorSuffix}Object`],
       ...systemWeights.semibold,
-      letterSpacing: Platform.OS === 'ios' && 0.75,
+      letterSpacing: Platform.OS === 'ios' ? 0.75 : undefined,
     },
     body: human[`body${colorSuffix}Object`],
     bodyEmphasized: {
       ...human[`body${colorSuffix}Object`],
       ...systemWeights.semibold,
-      letterSpacing: Platform.OS === 'ios' && -0.41,
+      letterSpacing: Platform.OS === 'ios' ? -0.41 : undefined,
     },
     subhead: human[`subhead${colorSuffix}Object`],
     subheadShort: {
@@ -36,20 +36,20 @@ const getStylesForColor = color => {
     subheadEmphasized: {
       ...human[`subhead${colorSuffix}Object`],
       ...systemWeights.semibold,
-      letterSpacing: Platform.OS === 'ios' && -0.24,
+      letterSpacing: Platform.OS === 'ios' ? -0.24 : undefined,
     },
     callout: human[`callout${colorSuffix}Object`],
     footnote: human[`footnote${colorSuffix}Object`],
     footnoteEmphasized: {
       ...human[`footnote${colorSuffix}Object`],
       ...systemWeights.semibold,
-      letterSpacing: Platform.OS === 'ios' && -0.08,
+      letterSpacing: Platform.OS === 'ios' ? -0.08 : undefined,
     },
     caption2: human[`caption2${colorSuffix}Object`],
     caption2Emphasized: {
       ...human[`caption2${colorSuffix}Object`],
       ...systemWeights.semibold,
-      letterSpacing: Platform.OS === 'ios' && 0.06,
+      letterSpacing: Platform.OS === 'ios' ? 0.06 : undefined,
     },
   };
 };
diff --git a/src/collections/material.js b/src/collections/material.js
index f72b672..e9cbb5d 100644
--- a/src/collections/material.js
+++ b/src/collections/material.js
@@ -25,77 +25,77 @@ const getStylesForColor = color => ({
     fontSize: 112,
     lineHeight: 128,
     ...systemWeights.light,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(112),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(112) : undefined,
     color: colors[color].secondary,
   },
   display3: {
     fontSize: 56,
     lineHeight: 64,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(56),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(56) : undefined,
     color: colors[color].secondary,
   },
   display2: {
     fontSize: 45,
     lineHeight: 64,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(45),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(45) : undefined,
     color: colors[color].secondary,
   },
   display1: {
     fontSize: 34,
     lineHeight: 52,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(34),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(34) : undefined,
     color: colors[color].secondary,
   },
   headline: {
     fontSize: 24,
     lineHeight: 32,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(24),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(24) : undefined,
     color: colors[color].primary,
   },
   title: {
     fontSize: 20,
     lineHeight: 28,
     ...systemWeights.semibold,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(20),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(20) : undefined,
     color: colors[color].primary,
   },
   subheading: {
     fontSize: 16,
     lineHeight: 24,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(16),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(16) : undefined,
     color: colors[color].primary,
   },
   body2: {
     fontSize: 14,
     lineHeight: 24,
     ...systemWeights.semibold,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(14),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(14) : undefined,
     color: colors[color].primary,
   },
   body1: {
     fontSize: 14,
     lineHeight: 20,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(14),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(14) : undefined,
     color: colors[color].primary,
   },
   caption: {
     fontSize: 12,
     lineHeight: 16,
     ...systemWeights.regular,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(12),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(12) : undefined,
     color: colors[color].secondary,
   },
   button: {
     fontSize: 14,
     lineHeight: 16,
     ...systemWeights.semibold,
-    letterSpacing: Platform.OS === 'ios' && sanFranciscoSpacing(14),
+    letterSpacing: Platform.OS === 'ios' ? sanFranciscoSpacing(14) : undefined,
     color: colors[color].primary,
   },
 });