Comparison

FlowStack vs beep! Interval Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FlowStack

This app helps you beat procrastination and sharpen focus with a simple timer and task manager. Organize your day into routines, stack tasks sequentially, and track your progress with built-in statistics. Ideal for individuals with ADHD, students, and professionals seeking enhanced productivity.

Highlights
  • Flexible task timer
  • Stack tasks sequentially
  • Build habits with daily routines
  • ADHD-friendly focus
  • Live Activities and Dynamic Island integration
  • Track daily & weekly stats
  • Unlimited tasks (free version)
Features
Read full description

No ads. No account required. Just focus. FlowStack is a simple productivity timer, task manager, and routine app designed to beat procrastination and sharpen focus by having a clear name and timer for your task. Use it as a flexible timer for personal, work or study tasks, daily routines, or a focus tool if you struggle with multitasking or constant task switching. FlowStack keeps you on track and making real progress, one task at a time. In FlowStack, each task or to-do has an estimated duration and a timer that starts ticking down when you start the session. This makes it easier starting the task, and helps you get into a flow state by focusing on one task at a time. The current task is also shown as a Live Activity and in the Dynamic Island, making it easy to stay on task even while you're using another app. Once you're done, FlowStack pushes you into the next task. Need more time to finish the first task? Simply add more time to the timer, or continue in a flow state where time is unlimited. If you want to use it as a to-do list rather than focus session, you can also complete a task without starting the timer. Perfect for: • Procrastinators who struggle getting started • People with ADHD seeking simple focus tools • Anyone organizing tasks into daily routines • Users wanting a simple system for recurring tasks • Fans of Pomodoro and Atomic Habits (habit stacking, time blocking) • Professionals and students boosting productivity and focus • Anyone starting good habits—fitness, mental health, cleaning, learning, etc. What makes FlowStack different? • Flexible task timer. Like Pomodoro, but customizable and clear • Stack tasks in sequence. Avoid distractions, build flow by doing tasks after eachother (habit stacking) • Build habits with daily routines (morning routine, workout, study, business tasks) • ADHD-friendly focus and clean time blocking, no clutter • Great for deep work, project planning, personal growth • Tasks, focus timers, routines all in one simple app Core features: • Stack tasks with individual timers to stay focused on one task at a time (Live Activities and Dynamic Island shows the current task name and time left) • Flexibly time block your schedule for focused productivity. Each task has an estimated duration, easily extendable in case you need more time for a task • Unlimited tasks & templates for recurring tasks (2 template/routine limit for free users, unlimited one-off tasks for free users) • Track daily & weekly stats for motivation • Lightweight, minimalist. No accounts, no ads, generous free version available FlowStack is your ADHD-friendly productivity tool to block distractions, maintain momentum, and stay organized. Whether you're tackling homework, working remotely, or aiming for a structured day, FlowStack turns your to-do list into action. Boost time management Stay productive with a built-in flexible Pomodoro timer Get motivated with simple progress tracking Apple terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

beep! Interval Timer

This app helps you manage your time effectively for various activities, from workouts to focused work sessions. It offers a customizable interval timer with a drag-and-drop editor, allowing you to create and save custom routines. Enjoy offline functionality and a unique sound library for non-intrusive alerts.

Highlights
  • Drag & Drop Timeline Editor
  • Customizable Intervals
  • Preset Routine Saves
  • Live Activity Support
  • Offline First Functionality
  • Exclusive Sound Library
Features
Read full description

Keep your time on beep! – whether you're working, exercising, or winding down. ⏳ Make Every Second Chime ◇ HIGHLIGHT ▸ Workflow Metronome – Keep tasks & workouts perfectly timed ▸ Time-boxing – No more slack, just focused progress ▸ Highly Customizable – From HIIT, Pomodoro to meditation, tailor every second ◇ KEY FEATURES • Drag & Drop Timeline Editor – Build and schedule interval stacks easily • Repeat Groups – Loop rounds effortlessly • Preset Saves – Store common routines for quick starts • Live Activity (require iOS 16+) – View progress on Lock Screen & Dynamic Island • Offline First – No internet? No problem • Picture-in-Picture – Toggle on-screen timer for active session • Exclusive Sound Library – Non-Intrusive alert tones blend smoothly with your music • Zero Logins – No accounts needed ◇ USE CASES • CrossFit & HIIT – Crush workouts with precision intervals • Yoga & Meditation – Seamless transitions between poses & breaths • Pomodoro & Deep Work – Laser-focused sessions, no distractions • Time Blocking – Structure your day like a pro • Digital Cuckoo Clock – Gentle alerts every 60 mins (or any interval) Never miss a beat. Download and setup your beep! session now

Screenshots

FlowStack4 screens
beep! Interval Timer4 screens

Verdict

The call

The clearest difference is ads: FlowStack at none against beep! Interval Timer's shown. FlowStack also leads on update cadence (every 5 days vs every 4 weeks) and ratings volume (8 vs 1). On price, rating, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FlowStack sells 3 in-app purchases, starting at $4.99 per month and beep! Interval Timer sells 6 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for FlowStack against 5.0 for beep! Interval Timer. That said, the two scores are not equally well evidenced: FlowStack has 8 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

FlowStack ships an update every 5 days, beep! Interval Timer every 4 weeks. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

Scorecard3 real differences · 7 level
FlowStack versus beep! Interval Timer: the parameters behind the verdict, then further details
ParameterFlowStackbeep! Interval Timer
PriceFreeFree
Rating4.9 (8 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings8 — better1
Update frequencyEvery 5 days — betterEvery 4 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.216.2
Further details — not scored
Size115 MB40 MB
Age rating4+4+
DeveloperNero studiosShun Lo

In-app purchases

3 purchases

FlowStack

Subscriptions2
  • Premium access monthly7 Days trial$4.991 Month
  • Premium access yearly3 Days trial$22.991 Year
One-time1
  • Lifetime$39.99
6 purchases

beep! Interval Timer

Subscriptions2
  • Plus+ Monthly$1.991 Month
  • Plus+ Annually$14.991 Year
One-time4
  • Tune Pack - Wanderland$9.99
  • Tune Pack - Thunky Funk$9.99
  • Tune Pack - Retro Station$9.99
Show 1 more
  • Tune Pack - Deep Zen$9.99

Questions

Is FlowStack free?
FlowStack is free to download, with in-app purchases available.
Is beep! Interval Timer free?
beep! Interval Timer is free to download, with in-app purchases available.
Which has better reviews, FlowStack or beep! Interval Timer?
beep! Interval Timer is rated higher. FlowStack averages 4.9 out of 5 from 8 ratings, while beep! Interval Timer averages 5.0 from 1 ratings.
Do FlowStack or beep! Interval Timer have ads?
beep! Interval Timer shows ads; FlowStack does not.
Which is updated more often, FlowStack or beep! Interval Timer?
FlowStack ships an update every 5 days, and beep! Interval Timer every 4 weeks. Most recently, FlowStack was updated on September 23, 2026 and beep! Interval Timer on September 24, 2026.

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