# Kalkulilo (Calculator) vs Outliner for iPad

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.

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. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Kalkulilo (Calculator) | Outliner for iPad |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | [4.5 (29 ratings)](https://appshunter.io/ios/app/kalkulilo-calculator/id286091993/reviews) | **[4.8 (13 ratings)](https://appshunter.io/ios/app/outliner-for-ipad/id360659928/reviews)** |
| Number of ratings | **29** | 13 |
| Positive reviews | 75.8% of reviews | **81.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 3 MB | 11 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Clauss](https://appshunter.io/developer/286091996) | [CarbonFin](https://appshunter.io/developer/284455729) |

## What reviewers say

### Kalkulilo (Calculator)

[App page](https://appshunter.io/ios/app/kalkulilo-calculator/id286091993)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 🚀 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

**What reviewers complain about**

- 🐛 Stopped working after OS update
- 💰 Ads introduced after being paid app
- 👎 Buttons too small, hard to press
- 🔍 Confusing color scheme and UI

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/outliner-for-ipad/id360659928)

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.

**Highlights:** Outlining tool, iPad exclusive

**In-app purchases:** none

**What reviewers like**

- 👍 Simple, intuitive interface
- 🚀 Fast and responsive performance
- 🔄 Seamless syncing across devices
- 💾 Free cloud backup and sync service
- 📱 Works on iPhone, iPad, and web

**What reviewers complain about**

- 🔤 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

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is Kalkulilo (Calculator) free?

Kalkulilo (Calculator) costs $2.99, and also offers in-app purchases.

### Is Outliner for iPad free?

Outliner for iPad costs $4.99, with no in-app purchases.

### Which has better reviews, Kalkulilo (Calculator) or Outliner for iPad?

Outliner for iPad is rated higher. Kalkulilo (Calculator) averages 4.5 out of 5 from 29 ratings, while Outliner for iPad averages 4.8 from 13 ratings.

### Do Kalkulilo (Calculator) or Outliner for iPad have ads?

Neither Kalkulilo (Calculator) nor Outliner for iPad shows ads.

### Which is updated more often, Kalkulilo (Calculator) or Outliner for iPad?

Kalkulilo (Calculator) ships an update every 2 months, and Outliner for iPad every 4 months. Most recently, Kalkulilo (Calculator) was updated on November 10, 2026 and Outliner for iPad on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*