diff --git a/CHANGELOG.md b/CHANGELOG.md
index caa403afbaf..89d11bb3aa0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.12.15
+
+* `Common`:
+    * `applyDiff` will return `Diff` object since this release
+    * `Android`:
+      * New functions/extensions `findViewsByTag` and `findViewsByTagInActivity`
+* `Coroutines`:
+    * Add `Flow` extensions `flatMap`, `flatMapNotNull` and `flatten`
+    * Add `Flow` extensions `takeNotNull` and `filterNotNull`
+
 ## 0.12.14
 
 * `Versions`:
diff --git a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/DiffUtils.kt b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/DiffUtils.kt
index f885b9f2ba1..596e413fa21 100644
--- a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/DiffUtils.kt
+++ b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/DiffUtils.kt
@@ -173,7 +173,7 @@ inline fun <T> Iterable<T>.calculateStrictDiff(
 fun <T> MutableList<T>.applyDiff(
     source: Iterable<T>,
     strictComparison: Boolean = false
-) = calculateDiff(source, strictComparison).let {
+): Diff<T> = calculateDiff(source, strictComparison).also {
     for (i in it.removed.indices.sortedDescending()) {
         removeAt(it.removed[i].index)
     }
diff --git a/common/src/main/kotlin/dev/inmo/micro_utils/common/FindViewsByTag.kt b/common/src/main/kotlin/dev/inmo/micro_utils/common/FindViewsByTag.kt
new file mode 100644
index 00000000000..ddd21752a5a
--- /dev/null
+++ b/common/src/main/kotlin/dev/inmo/micro_utils/common/FindViewsByTag.kt
@@ -0,0 +1,61 @@
+package dev.inmo.micro_utils.common
+
+import android.app.Activity
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.children
+import androidx.fragment.app.Fragment
+
+fun findViewsByTag(viewGroup: ViewGroup, tag: Any?): List<View> {
+    return viewGroup.children.flatMap {
+        findViewsByTag(it, tag)
+    }.toList()
+}
+
+fun findViewsByTag(viewGroup: ViewGroup, key: Int, tag: Any?): List<View> {
+    return viewGroup.children.flatMap {
+        findViewsByTag(it, key, tag)
+    }.toList()
+}
+
+fun findViewsByTag(view: View, tag: Any?): List<View> {
+    val result = mutableListOf<View>()
+    if (view.tag == tag) {
+        result.add(view)
+    }
+    if (view is ViewGroup) {
+        result.addAll(findViewsByTag(view, tag))
+    }
+    return result.toList()
+}
+
+fun findViewsByTag(view: View, key: Int, tag: Any?): List<View> {
+    val result = mutableListOf<View>()
+    if (view.getTag(key) == tag) {
+        result.add(view)
+    }
+    if (view is ViewGroup) {
+        result.addAll(findViewsByTag(view, key, tag))
+    }
+    return result.toList()
+}
+
+fun Activity.findViewsByTag(tag: Any?) = rootView ?.let {
+    findViewsByTag(it, tag)
+}
+
+fun Activity.findViewsByTag(key: Int, tag: Any?) = rootView ?.let {
+    findViewsByTag(it, key, tag)
+}
+
+fun Fragment.findViewsByTag(tag: Any?) = view ?.let {
+    findViewsByTag(it, tag)
+}
+
+fun Fragment.findViewsByTag(key: Int, tag: Any?) = view ?.let {
+    findViewsByTag(it, key, tag)
+}
+
+fun Fragment.findViewsByTagInActivity(tag: Any?) = activity ?.findViewsByTag(tag)
+
+fun Fragment.findViewsByTagInActivity(key: Int, tag: Any?) = activity ?.findViewsByTag(key, tag)
diff --git a/common/src/main/kotlin/dev/inmo/micro_utils/common/RootView.kt b/common/src/main/kotlin/dev/inmo/micro_utils/common/RootView.kt
new file mode 100644
index 00000000000..603f53f5f62
--- /dev/null
+++ b/common/src/main/kotlin/dev/inmo/micro_utils/common/RootView.kt
@@ -0,0 +1,7 @@
+package dev.inmo.micro_utils.common
+
+import android.app.Activity
+import android.view.View
+
+val Activity.rootView: View?
+    get() = findViewById<View?>(android.R.id.content) ?.rootView ?: window.decorView.findViewById<View?>(android.R.id.content) ?.rootView
diff --git a/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowFlatten.kt b/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowFlatten.kt
new file mode 100644
index 00000000000..6e5c6d4b729
--- /dev/null
+++ b/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowFlatten.kt
@@ -0,0 +1,39 @@
+package dev.inmo.micro_utils.coroutines
+
+import kotlinx.coroutines.flow.*
+import kotlin.js.JsName
+import kotlin.jvm.JvmName
+
+inline fun <T, R> Flow<Flow<T>>.flatMap(
+    crossinline mapper: suspend (T) -> R
+) = flow {
+    collect {
+        it.collect {
+            emit(mapper(it))
+        }
+    }
+}
+
+@JsName("flatMapIterable")
+@JvmName("flatMapIterable")
+inline fun <T, R> Flow<Iterable<T>>.flatMap(
+    crossinline mapper: suspend (T) -> R
+) = map {
+    it.asFlow()
+}.flatMap(mapper)
+
+inline fun <T, R> Flow<Flow<T>>.flatMapNotNull(
+    crossinline mapper: suspend (T) -> R
+) = flatMap(mapper).takeNotNull()
+
+@JsName("flatMapNotNullIterable")
+@JvmName("flatMapNotNullIterable")
+inline fun <T, R> Flow<Iterable<T>>.flatMapNotNull(
+    crossinline mapper: suspend (T) -> R
+) = flatMap(mapper).takeNotNull()
+
+fun <T> Flow<Flow<T>>.flatten() = flatMap { it }
+
+@JsName("flattenIterable")
+@JvmName("flattenIterable")
+fun <T> Flow<Iterable<T>>.flatten() = flatMap { it }
diff --git a/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowNullables.kt b/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowNullables.kt
new file mode 100644
index 00000000000..e6b665e47f3
--- /dev/null
+++ b/coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/FlowNullables.kt
@@ -0,0 +1,6 @@
+package dev.inmo.micro_utils.coroutines
+
+import kotlinx.coroutines.flow.*
+
+fun <T> Flow<T>.takeNotNull() = mapNotNull { it }
+fun <T> Flow<T>.filterNotNull() = takeNotNull()
diff --git a/gradle.properties b/gradle.properties
index 5c3e84ae4f3..3732f846fb0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -14,5 +14,5 @@ crypto_js_version=4.1.1
 # Project data
 
 group=dev.inmo
-version=0.12.14
-android_code_version=153
+version=0.12.15
+android_code_version=154