HappyKey vs Calmly Student
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HappyKey
This app offers a specialized keyboard for easily inputting a wide range of mathematical symbols. It includes numbers, operators, pi, infinity, and more, simplifying the process of writing math notation on your device.
- Specialized math symbol keyboard
- Includes numbers and operators
- Supports pi and infinity symbols
- Simplifies math notation input
- Customizable keyboard layout
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HappyKey provides you with a simple keyboard with many useful math symbols. It will fulfill all of your math notation needs with numbers, superscripts, pi, math operators and relations, infinity, and beyond. Install the app first, then to setup the keyboard go to Settings > General > Keyboard > Keyboards > Add New Keyboard > HappyKey Note: This is not a calculator. This is an additional keyboard that makes it easier to type math notation. Credit for the keyboard functionality and design goes to the open source Tasty Imitation Keyboard by Alexei Baboulevitch (GitHub user archagon).
Calmly Student
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Calmly Student is a calm exam planner and class schedule for high school and college. Enter your classes once and they repeat all semester; add exams and assignments and see exactly how many days are left. No ads. Instead of another loud to-do app, Calmly shows just today and asks for the one thing that matters. Everything else waits, quietly. PLAN WITHOUT THE NOISE A calm day-page with only today's classes, deadlines and focus. A full calendar in day, week, month and year when you need it. LOOK AFTER YOURSELF Habits that build gently, a daily mood check-in, sleep, breathing and quiet meditations. No streaks to shame you. STUDY, CALMLY Subjects and deadlines with an exam countdown, a focus timer for unhurried study and four brain games to warm up. WITH CALMLY PLUS A revision plan that fits around your classes, your whole test week in at once, grades with what you need on the next test, flashcards with spaced review and all brain games. And the everyday extras: meals and a shopping list, a simple budget, movement, your shared student house and a room finder. MAKE IT YOURS A soft paper look with themes you can choose, light or dark, in seven languages. Calmly is calm by design. No harsh warnings, no guilt, no noise. Just a gentle place for everything student life asks of you. Calmly Student is free to use, with no time limit. Calmly Plus costs 2.99 EUR a month or 19.99 EUR a year, and every new account gets 7 days of Plus free, with no payment needed. Plus renews automatically until you cancel it in your App Store account settings. Terms of Use: https://calmlystudent.com/terms Privacy Policy: https://calmlystudent.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: HappyKey at none against Calmly Student's 2. Calmly Student's advantage is update cadence (every 3 days vs every 8 months). On price, ads, device support and iOS requirement 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
Both are free to download. Calmly Student sells 2 in-app purchases, starting at $2.99 per month. HappyKey asks for nothing beyond the download.
HappyKey ships an update every 8 months, Calmly Student every 3 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | HappyKey | Calmly Student |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (9 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 8 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 26 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Baratti | Stephane de Barbanson |
In-app purchases
HappyKey
No in-app purchases
Calmly Student
- Calmly Plus Monthly7 Days trial$2.991 Month
- Calmly Plus Yearly$17.991 Year
Questions
Is HappyKey free?
Is Calmly Student free?
Do HappyKey or Calmly Student have ads?
Which is updated more often, HappyKey or Calmly Student?
Other comparisons
