Kalkulilo (Calculator) vs Outliner for iPad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalkulilo (Calculator)
This app offers a versatile calculator with multiple modes, including scientific, bitwise, statistical, trigonometric, base conversion, and time calculations. It features a simple mode with large buttons and customizable interface. Widgets for notification center and Apple Watch are also included.
- Scientific calculator functions
- Bit/integer mode with logical operations
- Statistical calculations
- Base/radix conversion (2-36)
- Time value calculations
- Customizable interface
- Apple Watch app and widget
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Kalkulilo is a comfortable calculator program and offers several different modes. - The scientific mode offers all the usual functions and operations like the basic arithmetical operations, power, logarithm, roots, trigonometry etc. - The bit/integer mode offers logical operations (AND, OR, XOR, >>, etc.) on bit level. All values can be displayed as binary, octal, decimal or hexadecimal numbers. Calculations can be done in 8, 16 32 or 64 bits. - In the statistics mode you can create a sample by adding several values and then calculate mean, median, quantil values, variance, standard deviation, range etc. - Trigonometry mode provides lots of trigonometric functions, including legacy ones - The base/radix mode allows you to do calculations with numbers of base 2 to base 36 - The Time mode lets you directly work with time values (hours, minutes seconds) - A simple calculator is also included, with just the basic operators and large buttons. The user interface can be customized, you can change the key colors for different categories of functions and operators which helps to distinguish and find these more easily. The App also includes calculator widgets for the homescreen which allows to do calculations directly from your homescreen and a calculator for the Apple Watch.
Outliner for iPad
This application is an iPad-exclusive outlining tool. It is a legacy version, with a universal app available for new users. Contact the developer for any inquiries.
- Outlining tool
- iPad exclusive
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** This is the iPad only version of Outliner. Outliner is now a Universal app, so new users should purchase that version instead. Please contact us for any questions. Thanks! **
Screenshots
Verdict
The clearest difference is in-app purchases: Outliner for iPad at none against Kalkulilo (Calculator)'s 1. Outliner for iPad also leads on rating (4.8 vs 4.5). Kalkulilo (Calculator)'s advantage is update cadence (every 2 months vs every 4 months) and price ($2.99 vs $4.99). On review sentiment, ratings volume, ads 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
Kalkulilo (Calculator) costs $2.99 and Outliner for iPad $4.99 up front. Kalkulilo (Calculator) sells 1 one-off in-app purchase. Outliner for iPad asks for nothing beyond the download.
Outliner for iPad holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 29 and 13 respectively. Written reviews point the same way: 76% of Kalkulilo (Calculator)'s written reviews are positive against 82% of Outliner for iPad's.
Kalkulilo (Calculator) ships an update every 2 months, Outliner for iPad every 4 months. Both last shipped on November 6, 2026.
| Parameter | Kalkulilo (Calculator) | Outliner for iPad |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 4.5 (29 ratings) | 4.8 (13 ratings) — better |
| Positive reviews | 75.8% of reviews | 81.5% of reviews — better |
| Number of ratings | 29 — better | 13 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Apple Watch — better | iPad |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Clauss | CarbonFin |
Customer experience
Kalkulilo (Calculator)
Outliner for iPad
User reviews
Kalkulilo (Calculator)
From 29 App Store ratingsWhat we love
- 🚀 Excellent, powerful calculator
- 👍 Variety of modes and number systems
- 👍 Intuitive and easy to use
- 👍 Highly functional for engineers, programmers, and students
- 👍 Replaces physical scientific calculators
Room to improve
- 🐛 Stopped working after OS update
- 💰 Ads introduced after being paid app
- 👎 Buttons too small, hard to press
- 🔍 Confusing color scheme and UI
Outliner for iPad
From 13 App Store ratingsWhat we love
- 👍 Simple, intuitive interface
- 🚀 Fast and responsive performance
- 🔄 Seamless syncing across devices
- 💾 Free cloud backup and sync service
- 📱 Works on iPhone, iPad, and web
Room to improve
- 🔤 Font size options too limited
- 👁️ Text too small for accessibility needs
- 🎨 No color or formatting options
- 📱 Separate paid apps for iPhone and iPad
- ⌨️ Poor keyboard support and shortcuts
Bugs and requests
Kalkulilo (Calculator)
Reported bugs
3 issues- Number doesn't transfer correctly when switching between modes
- Negative exponents not displayed correctly in engineering notation
- Loses calculation history when changing modes
Requested features
5 requests- Add calculus, linear algebra, and probability functions
- Implement a 'repeated equals' function
- Add a backspace/delete button
- Allow customizing color scheme
- Improve Apple Watch integration
Outliner for iPad
Reported bugs
12 issues- Font size settings don't include larger options
- Copy and paste functionality lost in recent updates
- OPML export doesn't preserve outline hierarchy in Word
- Text selection and cursor placement issues
- Sync authentication failures causing data loss
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- App crashes when creating new outlines
- Formatting lost when cutting and pasting
- Dropbox sync not automatic, requires manual setup per file
- Dialog changes don't update until closed
- Slow startup time on iPad
- Small touch targets for expand/collapse buttons
- Multi-line note preview not available
Requested features
20 requests- Larger font size options and accessibility settings
- Color coding and text formatting (bold, italics)
- Folder-based organization for outlines
- Due dates and reminders for tasks
- Password protection and encryption
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- PDF export functionality
- Keyboard shortcuts for navigation and hierarchy changes
- Multi-select and batch operations
- Columns for additional metadata
- Dark mode or customizable color themes
- Gantt chart or timeline view
- Desktop application for Windows/Mac
- Universal app (single purchase for iPhone and iPad)
- Automatic syncing without manual trigger
- Ability to move outlines between lists
- Rich text formatting in notes
- Web link detection and built-in browser
- Image and attachment support
- Numbered list export
- Integration with Google Tasks or iOS Reminders
In-app purchases
Kalkulilo (Calculator)
- Remove Ads$0.99
Outliner for iPad
No in-app purchases
Questions
Is Kalkulilo (Calculator) free?
Is Outliner for iPad free?
Which has better reviews, Kalkulilo (Calculator) or Outliner for iPad?
Do Kalkulilo (Calculator) or Outliner for iPad have ads?
Which is updated more often, Kalkulilo (Calculator) or Outliner for iPad?
Other comparisons
