Comparison

Sigma Planner vs Classify

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

Head to head
About

Sigma Planner

This app helps students organize their academic life by tracking classes, tasks, and schedules. It offers customizable features, cross-device syncing, and home screen widgets for easy access to important information.

Highlights
  • Organize courses by semester
  • Create and manage tasks with priority
  • Flexible class schedule support
  • Home screen widgets for quick access
  • iCloud sync across devices
  • Customizable themes and app icons
Read full description

Sigma Planner is the perfect companion app for your academics that will help you track your classes and tasks with ease. It features a wide range of features to help you stay organized, as well as a beautiful design that is smooth, customizable, and adaptive for every device. With Sigma Planner, you will never need to carry your school planner anymore; all your planner and school information is available on your iPhone, iPad, and Mac. ORGANIZATION Sigma Planner offers a wide variety of features to organize your academic life. You should not need to clear or clutter your timetable every time you move onto the next semester. Sigma Planner offers the ability to organize your courses by semesters, which will allow you to retain records of all your past classes and assignments without having to delete them. TASKS Tasks are the core of any type of planner. In Sigma Planner, tasks can be created for a course, on a date, with a different task type, priority, and more. Tasks should always be easy to find; with the built-in search and filter features, you will never lose a task. CLASS SCHEDULES Sigma Planner is fully equipped to handle the many different schedule types around the world. The app is very flexible supports time-based, period-based, and block-based schedules, as well as supporting biweekly schedules, and late start or early end dates for specific classes. You can also enable class notifications to receive alerts before your classes occur. WIDGETS On iOS 14, Sigma Planner offers three kinds of home screen widgets which allow you to quickly glance at your planner data. You can quickly view your up next classes and tasks, focus on a specific course, or display your current week's timetable right from your home screen. Each widget also contain customization options to display just the information you want. iCLOUD SYNC Your data is always up to date across your devices through iCloud. You can edit a task on your iPhone, and you will immediately see them on iPad or Mac as soon as you hit save. There are no logins; no external accounts; it just works. FLEXIBILITY There are many built-in customizations available in Sigma Planner, including: dark mode, custom accent colours, display styles for tasks and courses, notification customizations, and more. The app also includes a handful of custom app icons to really spice up your home screen! DESIGN The app has a clean, simple, and intuitive interface. On top of that, Sigma Planner comes with 60 course icons to customize your classes, all on top of the customizations you get with the app. These course icons are also available as an iMessage sticker pack that comes with the app so you can share them with your friends! FOR iPAD Sigma Planner also has additional features for iPadOS users with an interface that is better suited for the larger iPad screen size, while at the same time, remain adaptive in supporting split screen multitasking and multiple-windows. Additionally, you can even drag a course to show the course detail in a separate window. Sigma Planner also offers support for trackpads and mice. ACCESSIBILITY Accessibility is one of the most powerful features of the iPhone, iPad, and Mac. Sigma Planner supports system accessibility features like Voice Over and Voice Control. Moreover, the app supports Dynamic Type, which scales text based on your system's Dynamic Type settings. SECURITY Protecting your tasks and course information has never been easier. Unlike your paper agenda, Sigma Planner has the ability to lock the app with a passcode, and allow your to easily unlock with Touch ID and Face ID on available devices.

About

Classify

This app helps students organize their academic life by managing homework, schedules, and events. It features collaborative class group chats for effortless information sharing and a focus mode with a Pomodoro timer to boost productivity. Track your progress with detailed statistics and stay on top of your commitments.

Highlights
  • Class group chats for homework and event sharing
  • Digital homework diary with reminders
  • Focus mode with Pomodoro timer and study playlists
  • Intuitive timetable with alternating schedule support
  • Event and club management with calendar view
  • Detailed statistics on task completion and study habits
Features
Read full description

Whether you are attending elementary school, high school or college, Classify is the only organization app you’ll ever need. Now with the ability to create class group chats, you can share information about homework, events and clubs in one click, so you can let your classmates and friends organize for you. Getting down your homework, managing your timetable, events and clubs, plus a distraction-free space to stay focused, all in one app. KEY FEATURES: LET OTHERS ORGANIZE FOR YOU Our new class group chat feature, Classroom, allows you to share your homework, clubs and events all in one click. When you’re in a classroom and a classmate shares one of these to the group chat, it will automatically be added to your planner, details and all! Organization without effort. Now complete with subchats to discuss specific homework and events within a Classroom that get automatically archived over time. WRITE IT DOWN. LEVEL UP. Our digital homework diary means you will never forget to do your homework. Add details including the type of homework, what teacher has set it, add files and images, set reminders to not miss the deadline and more! FOCUS LIKE A PRO Stay fully focused with help of our latest feature, Zone, which helps you stay concentrated and stop procrastinating, leaving more time to do the things you love most. With an integrated pomodoro timer, curated study playlists and to-do lists, you can get more work done, in less time. STAY AHEAD OF YOUR SCHEDULE Quick and easy to set up, our intuitively-designed timetable means you will know exactly where to be and at what time. With flexibility and personalisation at its core, the timetable helps you know exactly what your day looks like — so forget roaming around the corridors cluelessly on your first day of school. Now supports alternating timetables. EVENTS AND CLUBS School life is stressful. You have to balance curricular and extra-curricular activities, and it can get overwhelming. Classify helps keep stress out of your routine and is your companion to help you remember about all your events, commitments, and responsibilities to make sure you can plan out your day-to-day and succeed in achieving all your ambitions. Set reminders, specify the frequency of the event, and then view it at a glance on our calendar view to never miss a meeting again. DETAILED STATISTICS TO HELP YOU IMPROVE Ever wondered what teacher gave out the most homework? And how many hours of your life you’ve spent on studying? And how much time you spent doing chores and other tasks on your to-do list? Classify can now answer all those questions with our stats page – which dives deep into your tasks and homework completed, what teachers and subjects are most homework-heavy, and how many hours you spend working on the things you’ve added to Classify. Because improving your workflow starts by understanding your current study habits and knowing where to improve. KEEP TRACK OF DAILY TASKS AND HABITS Academic success is achieved through more than just studying and doing your homework – so we developed Tasks to help you keep track and get reminded of any chores and other tasks you have to do. Sort tasks based on urgency to compartmentalise everything on your to-do list. … and so much more! Download Classify today to make organization the easiest step in your academic success. We would love for you to join the Classify family and be a part of our growing community! - Follow us on Instagram and Twitter: @classifyapp - Join our Discord community: https://discord.gg/EYSZ5QEEYC All legal information, including privacy policy and terms & conditions, are viewable here: https://classify.org.uk/legal

Screenshots

Sigma Planner4 screens
Classify4 screens

Verdict

The call

The clearest difference is update cadence: Sigma Planner at fortnightly against Classify's every 2 months. Sigma Planner also leads on review sentiment (91% vs 76%). On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sigma Planner holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 570 and 223 respectively. Written reviews point the same way: 91% of Sigma Planner's written reviews are positive against 76% of Classify's.

UpkeepUpdate frequency

Sigma Planner ships an update fortnightly, Classify every 2 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
Sigma Planner versus Classify: the parameters behind the verdict, then further details
ParameterSigma PlannerClassify
PriceFreeFree
Rating4.8 (570 ratings) — better4.6 (223 ratings)
Positive reviews91.4% of reviews — better75.5% of reviews
Number of ratings570 — better223
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.612.0 — better
Further details — not scored
Size28 MB181 MB
Age rating4+4+
DeveloperShao-Chi LiangPrincipal Technologies Ltd

Customer experience

Sigma Planner

All ratings570 ratings
Positive96.8%
Neutral2.8%
Negative0.4%
Written reviews139 reviews
Positive91.4%
Neutral6.5%
Negative2.2%

Classify

All ratings221 ratings
Positive91.0%
Neutral4.5%
Negative4.5%
Written reviews98 reviews
Positive75.5%
Neutral11.2%
Negative13.3%

User reviews

Sigma Planner

From 570 App Store ratings

What we love

  • 👍 Highly customizable
  • 🚀 Seamless syncing across devices
  • 💡 Comprehensive features for students
  • 👍 Clean and intuitive interface
  • 🚀 Completely free with no ads

Room to improve

  • 🐛 Calendar and date picker issues
  • 🐛 Occasional app crashes
  • 🐛 Courses/schedule not always displaying correctly

Classify

From 223 App Store ratings

What we love

  • 👍 User-friendly and intuitive interface
  • 💰 Completely free with no in-app purchases
  • 📚 Comprehensive homework and task management
  • 🎨 Sleek, visually appealing design
  • ⏱️ Pomodoro study session feature

Room to improve

  • 🐛 Frequent app crashes and freezing
  • 🐛 Data loss and disappearing tasks/homework
  • 🐛 Login and signup screen issues
  • 🐛 Homework/task page fails to load
  • 🐛 Unable to add tasks or events

Bugs and requests

Sigma Planner

Reported bugs

3 issues
  • Calendar not showing all months
  • Reminders not working as expected
  • Syncing issues between devices

Requested features

4 requests
  • Ability to set recurring tasks/assignments
  • Integration with other calendars (e.g. Google Calendar)
  • More visual indicators for completed tasks
  • Option to rearrange course order

Classify

Reported bugs

17 issues
  • Blank screen after signup
  • Username page stuck, cannot proceed past signup
  • App fails to open on multiple devices
  • Cannot add tasks or events
  • Homework/task page fails to load regularly
Show 12 more
  • Homework data deletes itself after marking complete
  • Homework data disappears after updates
  • Glitches erase entered homework/test information
  • Cannot save edited timetable times
  • Homework type duplicates when creating assignments
  • Classes switch around and times change automatically
  • Homework duplicates when added
  • Users logged out unexpectedly
  • Teacher names not saving
  • Add subject feature not working
  • Timetable screen completely blank
  • Add subject screen extremely glitchy

Requested features

20 requests
  • Widget support for home screen
  • Custom color themes and personalization
  • Two-week timetable (Week A/B) support
  • Ability to edit homework after creation
  • Custom time slots for lessons
Show 15 more
  • Recurring homework/events feature
  • Teacher name auto-save functionality
  • Link integration in homework details
  • Ability to add custom task types
  • Scan papers/projects into app
  • Holiday scheduling feature
  • Custom profile picture option
  • Apple Calendar integration
  • Bar graphs instead of line graphs for statistics
  • Ability to customize number of periods per day
  • Custom day names for timetables
  • Month overview on app opening
  • Larger font size for tasks
  • Upload custom songs for music
  • Block school time from study timetable

In-app purchases

None

Sigma Planner

No in-app purchases

None

Classify

No in-app purchases

Questions

Is Sigma Planner free?
Sigma Planner is free to download, with no in-app purchases.
Is Classify free?
Classify is free to download, with no in-app purchases.
Which has better reviews, Sigma Planner or Classify?
Sigma Planner is rated higher. Sigma Planner averages 4.8 out of 5 from 570 ratings, while Classify averages 4.6 from 223 ratings.
Do Sigma Planner or Classify have ads?
Neither Sigma Planner nor Classify shows ads.
Which is updated more often, Sigma Planner or Classify?
Sigma Planner ships an update fortnightly, and Classify every 2 months. Most recently, Sigma Planner was updated on October 2, 2026 and Classify on October 7, 2026.

Other comparisons