# Calclin — Roll Calculator & Formulas

> Calculator app with paper-roll history, formula input, and notes. (iPhone/iPad app by Azukid.com.)

- Source: https://appshunter.io/ios/app/calclin/id385216637 (this page in markdown: same URL + `.md`)
- Developer: [Azukid.com](https://appshunter.io/developer/354937951)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 2.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: American English, Japanese
- Released: 2010-08-07
- Data updated: 2026-07-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calclin/id385216637/reviews.md

## What is Calclin?

A calculator memo app with history that keeps your calculation process visible like a paper roll. Switch between calculator input and formula input to handle everything from everyday math to calculations you want to keep as records.

■ Calculator mode and Formula mode
Calculator mode evaluates left to right (5+5×2=20). Formula mode respects operator precedence (5+5×2=15) and supports parentheses and roots. Switch anytime from the input row, changing the calculation style without leaving the active input area.

■ Paper-roll style history
Expressions and answers stay on the roll from the top, so you can see the flow of your calculation at a glance. Subtle side lines and top shading keep each frame easy to distinguish, even with multiple rolls. In calculator mode, a running total can be shown while you type.

■ Edit rows and add notes
In calculator mode, tap any roll row to edit and recalculate. Add a note to any history entry. Swipe left to delete; swipe right to add a memo, copy the expression, or copy the answer.

■ PDF export
Export a calculation roll as a PDF whenever you want to keep it.

■ Use multiple calculators side by side
Up to a triple deck. Add or remove panels with the [+][−] header buttons, swipe or tap to switch, and double-tap to toggle between 1-panel and 2-panel views.

■ Unit-aware calculations
Calculate with units of length, area, volume, and weight.

■ Customizable keyboard
Long-press any key to define it, and merge keys vertically or horizontally to create larger keys. Switch between 5 layouts (30 keys each), and export or import your arrangement.

■ Flexible display settings
Choose the decimal point and grouping symbols, the grouping style (every 3 or 4 digits, Indian style), the number of decimal digits, and the rounding mode (including round half to even). Pick Auto, Light, or Dark appearance, and enlarge or reduce text size. Your settings are restored on next launch.

■ Beginner and Expert modes
Beginner mode shows labels and tips for each button. Once you are comfortable, Expert mode unlocks advanced operations such as long-press key editing.

The calculation engine uses C/C++ fixed-point decimal, stored internally in BCD arrays.

Note: Data is not encrypted. Please do not store personal or confidential information.

## Key features

- Paper-roll style calculation history
- Multiple calculation frames
- Formula input with parentheses and functions
- Notes for calculation results
- PDF export
- Customizable digit grouping, separators, and rounding
- Auto, Light, and Dark appearance modes

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tips_5 | $4.99 | one-time |
| Tips_1 | $0.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/calclin/id385216637/reviews.md

### 2/5 — Not well designed

*2013-04-04*

Number Keys could have been bigger.
Rolls are too short.
Too many Memory keys - M1 to M15! Normally 3 would have been enough, and customisation could have been provided, so that Rolls could be larger.
Ads poorly positioned.
Unique customisation, could have been better.
Wait for improved version before you buy.

### 5/5 — Very unique design

*2010-10-16*

Works great, and is fun to use.  Terrific value as a free app. I love the multiple memory options (15)

## Frequently asked questions about Calclin

### What is Calclin's primary function?

Calclin is a calculator app that provides a paper-roll style history, allowing users to easily review past calculations. It also supports formula input and the ability to add notes to results.

### Can Calclin handle complex calculations?

Yes, Calclin supports formula input, including parentheses and various functions, enabling it to handle more complex mathematical operations beyond basic arithmetic.

### How does Calclin help organize calculations?

Calclin allows users to switch between multiple calculation frames. This feature helps separate different tasks or projects, preventing the loss of previous work and keeping calculations organized.

### What export options does Calclin offer?

Calclin offers PDF export functionality, allowing users to save their calculation history and results in a shareable and printable format.

### Does Calclin have ads?

No, Calclin does not contain advertisements. It is a free application without any ads to interrupt the user experience.

### What devices is Calclin available on?

Calclin is available on iPhone and iPad devices, making it accessible for users within the Apple ecosystem.

### How frequently is Calclin updated?

The latest version of Calclin is 2.2.0, which was last updated on April 21, 2026. This indicates a history of updates, though the specific frequency is not detailed.

### What is the age rating for Calclin?

Calclin has an age rating of 4+, making it suitable for a wide range of users, including children and adults.

## Version history (last 5 releases)

### 2.3.1 — 2026-07-14

- Refreshed the app icon.
- Minor display adjustments and stability improvements.

### 2.3.0 — 2026-05-24

2.3.0 — What's New
- Glasses‑free reading! Choose your font size from Auto, Standard, Large, or Extra Large. Auto follows your iOS text‑size setting.
- Custom key shapes — you can now personalize the look of the keys. Tap the icon at the bottom‑right of the keyboard to give it a try.
- Adjustable keyboard height — long‑press the middle of the input row to reveal a drag handle, then drag to resize.
- Plus various improvements and bug fixes.

### 2.2.0 — 2026-04-21

- Added Auto, Light, and Dark appearance modes.
- Improved the paper-roll style calculation history design.
- Improved separators and selection display when using multiple calculation frames.
- Moved the Calculator/Formula and PDF buttons into the input row for easier access.
- Fixed an issue where deleting a calculation history row could delete a different row.
- Improved readability in Dark Mode.
- Made small visual and usability refinements.

### 2.1.0 — 2026-04-13

■ Calculator Mode
Added a simple left-to-right calculator mode (5+5×2=20).
Switch between Calculator and Formula mode (5+5×2=15) anytime.

■ Edit Past Roll Rows
In Calculator mode, tap any past row to edit the expression and recalculate.

■ Improved Keyboard Export
Choose your destination — AirDrop, Files, Mail, and more.
Exported filename: CalclinKeyboard_YYYYMMDD.json

■ PDF Export
Export the calculation roll as a PDF file.

### 2.0.2 — 2026-03-29

We have fixed several bugs.

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## More apps by Azukid.com

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All apps by Azukid.com: https://appshunter.io/developer/354937951

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-18.*