Best Random Timer Reaction Apps

250+ iOS apps curated and reviewed

3.8 avg rating

20 free apps

Updated September 2026

Random timer Interval randomizer for game & sleep is the household name in random timer reaction, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Random Timer Reaction Apps (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Random timer Interval randomizer for game & sleep	Free	1.8★ (15)	No	No	May 2026
2	Kairos: Random Timer	Free	—	No	No	May 2026
3	Repeat Timer App	Free	3.5★ (30)	No	Yes	Aug 2026
4	Timer ٞ	Free	4.4★ (1.2K)	Yes	No	Sep 2026
5	Random Tactical Timer	Free	5.0★ (1)	No	Yes	Sep 2026
6	Random Timer	Free	1.7★ (17)	No	No	May 2026
7	timer. - Multi Countdown Timer	Free	4.3★ (170)	No	Yes	Aug 2026
8	Chrono Pumpkin	Free	—	No	No	Jun 2026

Top Picks for Random Timer Reaction

#1

Random timer Interval randomizer for game & sleep by Alisa Unzhakova

A simple and random generator

Editor's Choice

1.8(15 ratings)

Free

Random timer Interval randomizer for game & sleep screenshot 1

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This app generates random intervals for timers, useful for gaming or sleep. It features background operation and a shake-to-set functionality for ease of use. The interface is designed to be simple and visually appealing.

#2

Kairos: Random Timer by Benno Kohrs

Countdown Timer, Auto Repeat

Strong Contender

0.0(0 ratings)

Free

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Kairos: Random Timer screenshot 2

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Kairos: Random Timer screenshot 4

Kairos: Random Timer screenshot 5

#3

Repeat Timer App by Renu Narwal

Repeat timer circuit training

Worth Considering

3.5(30 ratings)

FreeIn-App Purchases

Repeat Timer App screenshot 1

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Repeat Timer App screenshot 3

Repeat Timer App screenshot 4

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Repeat Timer App screenshot 6

This app adds unpredictability to routines with a customizable repeat timer. It enhances workouts, games, and daily tasks by introducing dynamic intervals and decision-making challenges. Enjoy a sleek design for seamless navigation and visual timing.

More Random Timer Reaction apps to explore

Kitchen cooking alarm

This application provides a clean, simple, and reliable timer for various timing needs, including cooking, sports, and work. It offers seamless integration with Apple Watch and Today Widgets, allowing for synchronized control and notifications.

Apple Watch supportToday Widget supportSynchronized timer control

Random Tactical Timer

Random Tactical Timer

Random Tactical Timer

MMA & Boxing Round Timer

This interval timer trains reaction under pressure with unpredictable cues, ideal for combat sports and high-intensity training. Features include hidden countdowns and customizable sound alerts. Optional Pro Tactical unlocks advanced features like coach callouts and an expanded sound library.

Random trigger timingHidden countdown modeHigh-intensity alarms and haptics

💪 Health & Fitness

This app provides customizable timers for various training activities, including sprints, shadow boxing, and agility drills. Users can set time intervals, choose signal types, select sounds, and even use custom voice signals for solo workouts.

Customizable time settingsChoice of signal typesSelectable sound options

💪 Health & Fitness

timer. - Multi Countdown Timer

timer. - Multi Countdown Timer

timer. - Multi Countdown Timer

Live Activities / Widget Timer

Manage multiple countdown timers simultaneously with this intuitive app. Set custom names, sounds, and even use your own music for alarms. Access timers easily via widgets, Apple Watch, and Live Activities.

Multiple simultaneous timersCustomizable names and alarm soundsBackground timer operation

free with in-app purchases

Simple timer and alarm

Reaction Timer Training

Reaction Timer Training

Reaction Timer Training

Reaction Training made simple!

Enhance your cognitive and physical performance with this reaction training app. Improve reaction time, decision-making, and coordination using customizable drills and Apple Watch integration. Track progress and sync data with the Health app.

Improve reaction timeEnhance decision timeDevelop peripheral vision

💪 Health & Fitness

free with in-app purchases

by Tim O's Studios, LLC

A straightforward timer app with a large display and two prominent buttons for easy operation. Enjoy a minimalist user experience designed for quick and simple timing needs.

Large displayTwo-button operationSimple design

Countdown clock timer

This app provides a reliable and accurate countdown timer with customizable alerts and a user-friendly interface. Personalize your timer with different colors and alarm sounds to suit any situation, from cooking to workouts.

Customizable colorsAlarm sound selectionUser-friendly interface

Simple Loop Timer

Simple Loop Timer

Simple Loop Timer

by Portly Pig Studios LLC

Timer-Kitchen timer&Stopwatch

Timer-Kitchen timer&Stopwatch

Timer-Kitchen timer&Stopwatch

Kitchen timer & Stopwatch

This utility app provides a simple and stylish timer and stopwatch. It offers background notifications, customizable themes and alarm sounds, and vibration options. An optional plugin can remove ads.

Background timer notificationsSelectable theme colorsSelectable alarm sounds

free with in-app purchases

Performance Timer

Performance Timer

Performance Timer

by Andrew Schweig

A large-display countdown timer for monitoring presentations or performances. It visually indicates time overruns by turning red and counting up, without audible alarms. Easily set for durations between 1 and 99 minutes.

Large display countdown timerVisual time overrun indicator (red count-up)No audible alarm

Timer - The simplest timer

Timer - The simplest timer

Timer - The simplest timer

Beautiful & Minimal Timer

$2.99 | 100% OFF

A minimalist timer app designed for everyday focus. It offers a clean interface with gesture controls and multiple display styles. The app works offline and provides background notifications for uninterrupted use.

Minimalist design with multiple stylesSimple gesture controlsMultiple time display formats

BNI Connect® Timer

BNI Connect® Timer

BNI Connect® Timer

This application helps users accurately track time for presentations and other timed events. It supports various durations, ensuring participants stay within their allotted speaking slots.

Time tracking for presentationsSupports 60-second presentationsTracks 10-minute showcases

Reaction Time Recorder

Reaction Time Recorder

Reaction Time Recorder

by Ryan O'Connor

Measure your reaction speed by responding to color changes on screen. Compete with friends and family to see who has the fastest reflexes. Simply connect two devices on the same Wi-Fi network to begin.

Reaction time testingMulti-device connectivityWi-Fi network connection

Random Timer Generator

Random Timer Generator

Random Timer Generator

A random countdown timer

This app generates random countdown timers within a specified time range. It's versatile for games, meditation, exercise, studying, and more. Customize sounds, vibrations, and looping modes for a personalized experience.

Configurable random countdownsAdjustable time ranges (0 seconds to 24 hours)Background operation support

free with in-app purchases

by Alexis Daniel Villicana Barrera

Visual Timer - Focus & Simple

Visual Timer - Focus & Simple

Visual Timer - Focus & Simple

Fast setup. See time left.

This utility app provides a visual countdown timer using a colored circle, making it easy to see remaining time at a glance. It's ideal for focused work sessions, managing children's activities, and everyday timekeeping tasks.

Visual countdown with colored circleQuick keypad time entryCustomizable colors and display

FAQ about Random Timer Reaction

What are the best random timer reaction apps for iPhone?

Random timer Interval randomizer for game & sleep tops our random timer reaction apps ranking as of September 2026, with a 1.8-star average from 15 App Store ratings, and it's free to download.

Are there free random timer reaction apps for iPhone?

Yes — 20 of the top random timer reaction apps we rank are free to download, including Random timer Interval randomizer for game & sleep and Kairos: Random Timer.

Does Random timer Interval randomizer for game & sleep have ads or in-app purchases?

Random timer Interval randomizer for game & sleep has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many random timer reaction apps are on the App Store?

We track 250+ random timer reaction apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.

What is Random Timer used for?

Random Timer is designed to generate random intervals for timers, which can be helpful for activities like gaming or for establishing sleep routines.

Does Random Timer work in the background?

Yes, Random Timer supports background operation, allowing the timer to continue running even when the app is not actively in use.