# Calculus doodlus — Friendly everyday calculator

> Handwritten-style interactive calculator with multi-page support and automatic saving. (iPhone/iPad app by Stéphan Barbé.)

- Source: https://appshunter.io/ios/app/calculus-doodlus/id465916328 (this page in markdown: same URL + `.md`)
- Developer: [Stéphan Barbé](https://appshunter.io/developer/313949257)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.80/5 from 540 App Store ratings · 500 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.3 · 7 MB
- Languages: English
- Released: 2011-09-23
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculus-doodlus/id465916328/reviews.md

## What is Calculus doodlus?

"A calculator app with a few extra nifty features that set it apart from the rest."
appadvice.com

Calculus doodlus is multi-page, saves your work automatically, calculates % and VAT,  and more... Check out all features and functions in the documentation.

Calculus doodlus creates an interactiv page that looks like you did your calculation by hand, and you can customize it with your own handwriting!

Please note that Calculus doodlus works like a classic calculator, operations are to be typed in and not drawn.

+++ iPhone App of the Week +++
Featured in Germany, Switzerland and Austria

## Key features

- Multi-page interface
- Automatic work saving
- Percentage calculation
- VAT calculation
- Customizable handwriting style
- Interactive calculation pages

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## What do users think of Calculus doodlus?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🚀 Efficient and fast
- 💡 Customizable handwritten numbers
- 📋 Keeps calculation history
- 🔢 Helpful percentage calculations

**Cons**

- 🐛 Crashes and freezes
- 🔍 Difficult to delete past calculations
- 💤 Slow performance after updates
- 🔧 Lacks advanced features

**Commonly reported bugs**

- Calculation results not displaying correctly
- App crashing on launch for some users
- Handwritten numbers not registering properly

**Most requested features**

- Add ability to edit/delete individual calculations
- Implement a dark mode option
- Include more advanced math functions
- Allow copying/pasting of individual numbers
- Improve multitasking support

## Recent user reviews (10 of 500)

All indexed reviews: https://appshunter.io/ios/app/calculus-doodlus/id465916328/reviews.md

### 5/5 — Graeme

*2026-08-10, version 2.1.2*

Great calculator.

### 5/5 — ليبيا

*2026-01-25, version 2.1.0*

ممتاز جدا

### 5/5 — Great job! Very clean and stable App! ⭐️

*2026-01-24, version 2.1.0*

Using this app on all of my iPhones from last maybe more than 6 years. Very stylish and helpful. 
Thank you for making our lives easier. You’re the best.

### 5/5 — 良き！

*2026-01-23, version 2.1.0*

とてもわかりやすく、デザインも良い。使用頻度高い。

### 5/5 — Please

*2026-01-23, version 2.1.0*

Please make a pro version. I don't want to see ads.

### 5/5 — Fantastica

*2026-01-23, version 2.1.0*

Bellissima app complimenti

### 5/5 — Batucada Xalapa 🇲🇽

*2026-01-23, version 2.1.0*

Está genial!!!!

### 3/5 — Fantastic features

*2026-01-21, version 2.1.0*

Me gusta mucho, pero pagaría más por nuevas features, por ejemplo no me gusta que cuando borras una nota te crea otra en blanco, y si repites la operación de alguna forma acabas con muchas hojas en blanco, estaría padre un gestor como si fueran pestañas

### 5/5 — Top

*2026-01-21, version 2.1.0*

Top

### 5/5 — Mükemmel

*2026-01-21, version 2.1.0*

Reklam izleyip extra reklamsız gün kazanma özelliği de çok iyi bu özellik lütfen kalsın uygulamada mükemmel

## Frequently asked questions about Calculus doodlus

### What does Calculus doodlus do?

Calculus doodlus is a calculator app that offers a multi-page interface, automatic saving of your work, and advanced functions like percentage and VAT calculations. It also allows you to create interactive pages that mimic handwritten calculations, which can be customized with your own handwriting.

### What are the key features of Calculus doodlus?

Key features include a multi-page interface for organizing calculations, automatic saving of all your work, the ability to calculate percentages and VAT, and a unique interactive page that looks like it was calculated by hand. You can even customize this handwritten style with your own script.

### How is Calculus doodlus monetized?

The application is available for free but includes in-app purchases. This means you can download and use the basic functionalities without cost, with options to purchase additional features or enhancements.

### What kind of devices is Calculus doodlus compatible with?

The description mentions it was featured as an 'iPhone App of the Week' and was featured in Germany, Switzerland, and Austria, indicating strong compatibility with iOS devices. It functions like a classic calculator, requiring typed input for operations.

### Who would benefit from using Calculus doodlus?

This app is ideal for students, professionals, or anyone who frequently uses a calculator and appreciates a more personalized and visually appealing way to view their calculations. The handwritten style and customization options make it stand out for everyday use.

## Version history (last 5 releases)

### 2.1.2 — 2026-04-21

A tiny update: there’s now a quick consent screen for ads, as required by the latest guidelines. The rest of the app stays as simple and friendly as you know it.

### 2.1.1 — 2026-04-13

A tiny update: there’s now a quick consent screen for ads, as required by the latest guidelines. The rest of the app stays as simple and friendly as you know it.

### 2.1.0 — 2026-01-20

A tiny update: there’s now a quick consent screen for ads, as required by the latest guidelines. The rest of the app stays as simple and friendly as you know it.

### 2.0.2 — 2020-07-27

Bug fixes.
Thanks for your feedback!

### 2.0.1 — 2020-07-18

Localization for Switzerland

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## More apps by Stéphan Barbé

- [Pythagorus doodlus](https://appshunter.io/ios/app/pythagorus-doodlus/id6754364531)
- [Molekula](https://appshunter.io/ios/app/molekula/id6758935250)
- [Pinblok](https://appshunter.io/ios/app/pinblok/id6769137187)

All apps by Stéphan Barbé: https://appshunter.io/developer/313949257

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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 2026-08-22.*