Apps like Concentration Tool

Here are some great alternatives to Concentration Tool by gustar-droid :
Concentration training
Concentration training
★4.6
Concentration
Concentration
★4.0
White Noise - calm,concentrate
White Noise - calm,concentrate
★4.5
Wisey: Deep Focus
Wisey: Deep Focus
★3.6
FocusTimer /Pomodoro Technique
FocusTimer /Pomodoro Technique
★4.5
Mung: Relax, Breathe, Focus
Mung: Relax, Breathe, Focus
★3.5
Pomodoro Timer - Focus Keeper
Pomodoro Timer - Focus Keeper
★3.9
Speed reading - Schulte table
Speed reading - Schulte table
★4.3
Nature sounds relax & sleep
Nature sounds relax & sleep
★4.7
Decoder Brain Training
Decoder Brain Training
★4.1
Screen Color Filter Lite
Screen Color Filter Lite
★3.9
Focus Hero: Achieve your Goals
Focus Hero: Achieve your Goals
★4.3
OffScreen - Less Screen Time
OffScreen - Less Screen Time
★3.3
Foca: Pomodoro Focus Timer
Foca: Pomodoro Focus Timer
★4.4
Color Filter
Color Filter
★3.6
Screen & Notifications Dimmer
Screen & Notifications Dimmer
★4.6