diff --git a/FTTestingKit.podspec b/FTTestingKit.podspec
index fa18db7..d5d29ed 100644
--- a/FTTestingKit.podspec
+++ b/FTTestingKit.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "FTTestingKit"
-  s.version          = "0.2.0"
+  s.version          = "0.3.0"
   s.summary          = "Mockup and asynchronous testing protocols and extensions."
   s.description      = <<-DESC
     Testing helpers for easier testing mockups and asynchronous testing.
diff --git a/README.md b/README.md
index 1941c7b..4cd5975 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,92 @@
 # FTTestingKit
 
-A description of this package.
+![Cocoapods](https://img.shields.io/cocoapods/v/FTTestingKit)
+![Cocoapods platforms](https://img.shields.io/cocoapods/p/FTTestingKit)
+![Cocoapods](https://img.shields.io/cocoapods/l/FTTestingKit)
+![Bitrise](https://img.shields.io/bitrise/f8e8740dfdd3c6a2?token=_ejKL14TVCB_KLWT4-wDxw)
+
+A set of helpers for simple creation of mockups, random values and testing of asynchronous code.
+
+## Installation
+
+When using Swift package manager add this line
+to your dependencies or install using Xcode 11 or newer:
+
+```swift
+.package(url: "https://github.com/thefuntasty/FTTestingKit.git", from: "0.3.0")
+```
+
+When using CocoaPods add following line to your `Podfile`:
+
+```ruby
+pod 'FTTestingKit', '~> 0.3'
+```
+
+When using `PromiseKit` you can use either `FTTestingKitPromiseKit`
+target for testing promises or add subspec to your `Podfile`:
+
+```ruby
+pod 'FTTestingKit', '~> 0.3', subspecs: ['PromiseKit']
+```
+
+## Features
+
+Main features of this library are generating mockups,
+random values, arrays and asynchronous testing.
+
+### Mockups
+
+For simple repeated execution the library offers Ruby-like extension on `Int` type. This is helpful in measurement tests.
+
+```swift
+10.times {
+    doSomething()
+}
+10.times(doSomething)
+```
+
+This extension can create arrays too:
+
+```swift
+10.times {
+    Int.random()
+}
+10.times(String.random)
+```
+
+The framework extends some basic types (`Date`, `String`)
+with random generation similar to `Int`.
+All these types conform to `Mockup` protocol
+which formally describes this functionality.
+
+```swift
+Date.random()
+String.random()
+Int.random(count: 10)
+```
+
+### Expectations
+
+The framework extends `XCTestCase` with simple methods to call transactional asynchronous test like this:
+
+```swift
+expect(within: 0.5) { reply in
+    DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
+        reply(.success)
+    }
+}
+```
+
+Extension for `PromiseKit` builds on this and offers testing promises using so-called belief in promise method:
+
+```swift
+believe(for: 0.5, in: someFunctionReturningPromise())
+```
+
+## Author
+
+Matěj Kašpar Jirásek, <matej.jirasek@thefuntasty.com>
+
+## License
+
+FTTestingKit is available under the MIT license. See the [LICENSE file](LICENSE) for more info.
diff --git a/Sources/FTTestingKit/Int+Times.swift b/Sources/FTTestingKit/Int+Times.swift
index b6c5cbf..d5cb8da 100644
--- a/Sources/FTTestingKit/Int+Times.swift
+++ b/Sources/FTTestingKit/Int+Times.swift
@@ -1,11 +1,18 @@
-public extension Int {
-    func times(execute: () -> Void) {
+extension Int {
+    /// Executes supplied closure n-times.
+    /// Handy for time measurement tests.
+    /// - Parameter execute: Closure executed n-times.
+    public func times(execute: () -> Void) {
         for _ in 0..<self {
             execute()
         }
     }
 
-    func times<T>(execute: () -> T) -> [T] {
+    /// Creates array of items by executing supplied
+    /// closure n-times. Handy for generating
+    /// arrays of random values.
+    /// - Parameter execute: Closure returning some item n-times.
+    public func times<T>(execute: () -> T) -> [T] {
         return (0..<self).map { _ in execute() }
     }
 }
diff --git a/Sources/FTTestingKit/Mockup.swift b/Sources/FTTestingKit/Mockup.swift
index 2c93c5c..b32b0a4 100644
--- a/Sources/FTTestingKit/Mockup.swift
+++ b/Sources/FTTestingKit/Mockup.swift
@@ -1,5 +1,10 @@
+/// Protocol unifying the form of randomly generated mockups.
 public protocol Mockup {
+    /// Generates one randomly generated mockup.
     static func random() -> Self
+    /// Generates array of randomly generated mockups.
+    /// - Parameter count: Number of generated items.
+    static func random(count: Int) -> [Self]
 }
 
 public extension Mockup {
diff --git a/Sources/FTTestingKit/Result+Void.swift b/Sources/FTTestingKit/Result+Void.swift
index 990e5a0..a58a509 100644
--- a/Sources/FTTestingKit/Result+Void.swift
+++ b/Sources/FTTestingKit/Result+Void.swift
@@ -1,4 +1,5 @@
 public extension Result where Success == Void {
+    /// Convenience case for success results with void values.
     static var success: Result<Void, Error> {
         return .success(())
     }
diff --git a/Sources/FTTestingKit/String+Mockup.swift b/Sources/FTTestingKit/String+Mockup.swift
index 9e6c92e..b11aad5 100644
--- a/Sources/FTTestingKit/String+Mockup.swift
+++ b/Sources/FTTestingKit/String+Mockup.swift
@@ -6,6 +6,9 @@ extension String: Mockup {
         return random(length: 15, characters: mockupCharacters)
     }
 
+    /// Generates random string of required length from supplied characters.
+    /// - Parameter length: Length of the generated string in characters.
+    /// - Parameter characters: Array of characters used to generate the random string.
     public static func random(
         length: Int,
         characters: [Character]
diff --git a/Sources/FTTestingKit/XCTest+Expect.swift b/Sources/FTTestingKit/XCTest+Expect.swift
index bf65cb9..db6fc07 100644
--- a/Sources/FTTestingKit/XCTest+Expect.swift
+++ b/Sources/FTTestingKit/XCTest+Expect.swift
@@ -1,6 +1,12 @@
 import XCTest
 
 public extension XCTestCase {
+    /// Executes new asynchronous test using expectation and encapsulates the operation
+    /// into transaction inside a closure.
+    /// - Parameter seconds: Seconds until the expectations will time-out.
+    /// - Parameter reply: Closure for encapsulating asynchronous tests into transactions,
+    ///                    the parameter of the clousre is callback for returning the result
+    ///                    of the asynchronous operation.
     func expect(
         within seconds: TimeInterval,
         reply: @escaping (@escaping (Result<Void, Error>) -> Void) -> Void
diff --git a/Sources/FTTestingKitPromiseKit/XCTest+Believe.swift b/Sources/FTTestingKitPromiseKit/XCTest+Believe.swift
index c9ca1c5..f6f5a66 100644
--- a/Sources/FTTestingKitPromiseKit/XCTest+Believe.swift
+++ b/Sources/FTTestingKitPromiseKit/XCTest+Believe.swift
@@ -5,6 +5,11 @@ import FTTestingKit
 #endif
 
 public extension XCTestCase {
+    /// Executes new asynchronous test using expectation and encapsulates the operation
+    /// into a closure returning promise.
+    /// - Parameter timeInterval: Number of seconds until the test will time-out.
+    /// - Parameter promise: Operation encapsulated inside of promise which will be
+    ///                      tested for time-out and successful result.
     func believe<T>(for timeInterval: TimeInterval, in promise: @escaping @autoclosure () throws -> Promise<T>) {
         expect(within: timeInterval) { reply in
             firstly { try promise() }.asVoid().recover { error in
@@ -15,6 +20,11 @@ public extension XCTestCase {
         }
     }
 
+    /// Executes new asynchronous test using expectation and encapsulates the operation
+    /// into a closure returning guarantee.
+    /// - Parameter timeInterval: Number of seconds until the test will time-out.
+    /// - Parameter promise: Operation encapsulated inside of guarantee which will be
+    ///                      tested for time-out and successful result.
     func believe<T>(for timeInterval: TimeInterval, in guarantee: @escaping @autoclosure () -> Guarantee<T>) {
         expect(within: timeInterval) { reply in
             guarantee().asVoid().done {
diff --git a/Tests/FTTestingKitPromiseKitTests/BelieveTests.swift b/Tests/FTTestingKitPromiseKitTests/BelieveTests.swift
index 475de29..56c8200 100644
--- a/Tests/FTTestingKitPromiseKitTests/BelieveTests.swift
+++ b/Tests/FTTestingKitPromiseKitTests/BelieveTests.swift
@@ -4,11 +4,11 @@ import FTTestingKitPromiseKit
 
 final class BelieveTests: XCTestCase {
     func testInstantPromise() {
-        believe(for: 0.1, in: Promise())
+        believe(for: 0.5, in: Promise())
     }
 
     func testDelayedPromise() {
-        believe(for: 0.1, in: after(seconds: 0.05))
+        believe(for: 0.5, in: after(seconds: 0.05))
     }
 
     static var allTests = [
diff --git a/Tests/FTTestingKitTests/ExpectationTests.swift b/Tests/FTTestingKitTests/ExpectationTests.swift
index 4abb761..4f4fffd 100644
--- a/Tests/FTTestingKitTests/ExpectationTests.swift
+++ b/Tests/FTTestingKitTests/ExpectationTests.swift
@@ -3,13 +3,13 @@ import FTTestingKit
 
 final class ExpectationTests: XCTestCase {
     func testInstantExpectation() {
-        expect(within: 0.1) { reply in
+        expect(within: 0.5) { reply in
             reply(.success)
         }
     }
 
     func testAsyncExpectation() {
-        expect(within: 0.1) { reply in
+        expect(within: 0.5) { reply in
             DispatchQueue.main.async {
                 reply(.success)
             }
@@ -17,7 +17,7 @@ final class ExpectationTests: XCTestCase {
     }
 
     func testDelayedExpectation() {
-        expect(within: 0.1) { reply in
+        expect(within: 0.5) { reply in
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
                 reply(.success)
             }