10 Best Optimizers for Android

1) Clean Master

System: Android

Recommend stars: 4.5

Description: The world's most trusted Android Optimizer, Speed Booster and Free Anti-Virus app, Clean Master helps accelerate and clean up over 400 million phones! It also provides real time protection with its #1 antivirus engine and secures your private data with the AppLock function.

Pros: Multi functional, easy to use, responsive and clean user interface

Cons: Nothing new to add to maintenance and cleaning, app manager is unnecessary

2) DU Speed Booster

System: Android

Recommend stars: 4.5

Description: DU Speed Booster can help protect your smart phone with free built in security features. It cleans your system from unwanted files and increases your storage space.

Pros: Speeds up your android phone or tablet, hosts loads of devices for smart phone maintenance, sweet user interface.

Cons: Ram cleaning can often cause a few issues here and there.

3) SD Maid

System: Android and iOS

Recommend stars: 4.5

Description: It is a storage and maintenance app designed to free up space on your SD card or internal memory.
Pros: It regains precious memory and keeps it clean and tidy.

Cons: Comes with a “use at own risk” message.

4) CCleaner

System: Android and iOS

Recommend stars: 4.5

Description: It speeds up phone and removes junk safely, cleans application cache.  

Pros: Free to use, powerful system cleaning.

Cons: Like any cleanup utility can cause trouble if used overzealously.

5) Nova Launcher

System: Android and iOS

Recommend stars: 4.5

Description: Another element that could be slowing your Android phone down is the custom launcher that the manufacturer has installed. If you find all the extras and doodads distracting, or worse, if you find that they actually slow your phone down, consider getting a customizable launcher like Nova Launcher. Fast and sleek.

Pros: Pure Android experience; intuitive improvements; fast performance.

Cons: Must find new themes manually; relatively few widgets and plug-ins; very few special effects.

6) CPU Tuner

System: Android and iOS

Recommend stars: 4

Description: CPU Tuner allows you to monitor and tweak your CPU's performance, customize the settings for your CPU governor, under clock to save battery, over clock to improve performance, and set various trigger-based performance profiles to ensure your CPU performs just the way you want.

Pros: An all rounder among its competitors.

Cons: The user interface could have been improved.

7) 3c Toolbox

Recommend stars: 5

Description: 3c Toolbox, formerly known as Android Tuner, provides users with a ton of diagnostic and tweaking tools that a savvy user can utilize to diagnose and improve the health of their system. The toolbox includes a task manager to manage (or kill) your apps, backup or restore APKs.

Pros: Extremely powerful, easy to use, comes with more functions that you can actually use, currently on sale

Cons: Permissions and access restrictions.

8) Device Control

System: Android

Recommend stars: 4

Description: Device Control is a system tweaking and device monitoring app that takes advantage of the elevated permissions of a rooted device to let you tweak numerous device and OS settings. Users can configure CPU and GPU frequencies to over or under clock, enable or disable device specific features such as Knock-On and vibration strength.

Pros: App gives parents control to remotely lock and unlock their phones, a solution for the problem of children not returning parent’s call out of defiance.

Cons – Potential vulnerability to be uninstalled by child, quirky and could use overall polish with user experience and user interface.

9) BetterBatteryStats

System: Android

Recommend stars: 4

Description: While the Android settings menu provides users with some insight on battery status and how much energy is in use, technically oriented users can get far more comprehensive information with apps like BetterBatteryStats.

Pros: Easy “Optimize” button extends battery power; pro version includes preset power modes which can be customized, plenty of monitors and stats about battery.

Cons: Hanging problem

10) Greenify

System: Android

Recommend stars: 4.5

Description: Greenify basically puts an app in a state of hibernation, unable to access system resources, bandwidth or run background processes. However, Greenify allows you to run an app normally in the foreground when explicitly called by the user without any extra fuss.

Pros:  Responsive and easily navigable UI, auto analyzer intelligently discovers resource hogs and optimal apps.

Cons - Requires root access. All background app functionality ceases when an app is in hibernation, this can render certain apps useless like alarms, and social network apps.