# Infoboo — Interactive Formula Book

> Interactive Formula Book (iPhone/iPad app by HB Montatech GmbH.)

- Source: https://appshunter.io/ios/app/infoboo/id1451603177 (this page in markdown: same URL + `.md`)
- Developer: [HB Montatech GmbH](https://appshunter.io/developer/1451603176)
- Category: Utilities, Education
- Price: $1.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 12.0 · 26 MB
- Languages: American English, French (France), German (Germany)
- Released: 2019-08-18
- Data updated: 2025-01-09
- User reviews in markdown: https://appshunter.io/ios/app/infoboo/id1451603177/reviews.md

## What is Infoboo?

No formula book? No problem! We have already prepared various formulas for you in such a way that you only have to enter the values and can read the solution. Among them are calculations of angles, areas, distances and much more.

Infoboo is useful for students, plumbers, locksmiths, carpenters, joiners, polymechanics as well as for the metal industry, mechanical engineering and craftsmen of any kind. The app works without an internet connection and therefore in every cellar.

Triangle:
Calculation of angles, side lengths, area, circumference, volume and mass with different densities

Square:
Calculation of side lengths, diagonals, area, circumference, volume and mass with different densities

Rectangle:
Calculation of side lengths, diagonals, area, circumference, volume and mass with different densities

Circle:
Calculation of radius, circumference, area and mass with different densities

Length division:
Calculation of sections with optional start and end distances

Try it out!

Do you want more formulas? Then please contact us with a specific request at ios-support@infoboo.com

Thank you very much.
Your Infoboo Team

## Pricing and in-app purchases

Base price: $1.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Triangle | $1.99 | one-time |
| Square | $0.99 | one-time |
| Rectangle | $0.99 | one-time |
| Circle | $0.99 | one-time |
| Length Division | $0.99 | one-time |
| Percentage | $0.99 | one-time |
| Slope | $0.99 | one-time |
| Interest | $0.99 | one-time |
| Compound Interest | $0.99 | one-time |



## Version history (last 5 releases)

### 2.0.0 — 2021-01-06

Instead of activating individual calculators with the purchase in the app, you now get everything with a one-time purchase of the app.

### 1.3.1 — 2020-12-01

- Dark mode bug fix

### 1.3.0 — 2020-07-23

- New calculators: percentage, slope, interest and compound interest
- For the square, rectangle and circle, the height and perimeter can now be specified.
- Custom densities
- Landscape on iPad

### 1.2.0 — 2020-03-20

- App is now available on iPad
- New formula view

### 1.1.0 — 2019-11-26

- English and French are now supported.
- New densities were added.
- The menu bar is now responsive to the screen size.

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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 2025-01-09.*