# Numbers & Place Value — Understand our number system

> Interactive place value exploration and number understanding tool for mathematics education. (iPhone/iPad app by Christian Urff.)

- Source: https://appshunter.io/ios/app/numbers-and-place-value/id1640564851 (this page in markdown: same URL + `.md`)
- Developer: [Christian Urff](https://appshunter.io/developer/415894463)
- Category: Education
- Price: $0.99 (on sale, was $1.99)
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: American English, German (Germany)
- Released: 2022-08-31
- Data updated: 2026-09-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/numbers-and-place-value/id1640564851/reviews.md

## What is Numbers & Place Value?

Explore large and small numbers and discover how place value works – interactively. This is not a drill app but an open environment for exploring and experimenting.

Understanding place value is one of the most important foundations in mathematics: it underpins mental and written calculation strategies, decimals and much more.

HOW IT WORKS
Drag the digits up and down with your finger. Go beyond 9 and watch ten items bundle into one item of the next place. Go below 0 and see how the next place is "unbundled".

Swipe or tap the quantity below a digit to change it.

At the bottom of the screen, choose how the quantity is shown: place value counters, base-ten (Dienes) blocks, euro money, dot fields, 3D base-ten material and more.

TOOLS ON THE RIGHT
- Speaker: listen to the number being read aloud.
- Speech bubble with check mark: read the number aloud yourself and check whether you read it correctly.
- Expand: shows, for example, 142 as 100 + 40 + 2.
- Dice: roll a random new number.
- Speech bubble with dots: say a number and watch it appear.
- Question mark: some places are covered, the number is read aloud and you fill in the missing digits.

MORE OPTIONS
- Use the grey arrows to add or remove places – explore numbers up to 100 trillion.
- Move the decimal point to work with decimals down to millionths.
- Tap a place label (O, T, H …) to change its color.
- Swipe across a digit to cover it; tap the cover to enter your answer and get feedback.
- Number words above the digits in matching place colors – optionally as "Say Ten" number words (e.g. 284 = "two hundred eight ten four").
- Many settings in the app: thousands separator, place labels, speech rate, show or hide tools and representations, protect settings.
- Share a setup or task with your class via QR code.
- English (UK/US) and German.
- Also available in the browser: zahlen.urff.app

IDEAS FOR THE CLASSROOM
- Number dictation: show 3,469.
- Keep adding one to the ones. What happens when you go past 9?
- Show 340. What happens when you take one away from the ones? What about 300?
- Show 5,216 and expand it: which numbers make it up (5,000 + 200 + 10 + 6)? What about 5,316?
- Listen to a number, then change one place. Can you read the new number correctly?
- Tap the question mark and solve some tasks – the app counts them for you.
- Why does the leading zero in 0453 disappear? Why does the zero stay in 204 or 240?

## Key features

- Interactive place value manipulation
- Multiple visual representations (tokens, Dienes, money)
- Number-to-speech functionality
- Number verification and spoken input
- Decomposition and random number generation
- Customizable number ranges up to 100 trillion
- Decimal number support

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/numbers-and-place-value/id1640564851/reviews.md

### 4/5 — Bitte um Veränderung Zusatzfunktion

*2023-12-05*

Um den Schülern Aufgaben zu stellen („Wie viele?“ oder in der andere Richtung „geschrieben Zahl“ —> „Lege“) wäre ein separates Aufdecken der Zahl und der dazugehörigen Mengendarstellung hilfreich.

**Developer response:** Diese Funktion gibt es bereits. Einfach von links nach rechts über eine Zahl wischen.

### 5/5 — Sehr empfehlenswertes Tool!

*2023-10-30*

Sehr hilfreiche Features trotz sehr übersichtlicher Gestaltung. Die Sprachaus- und eingabe-Optionen empfinde ich als super Ergänzung.

### 5/5 — Super!

*2022-08-31*

Kann ich gut im Unterricht einsetzen!

### 5/5 — Tolle App zur Veranschaulichung!

*2022-08-31*

Tolle App um unser Zahlsystem zu veranschaulichen. Gerade die Bündelung und Entbündelung wird toll gezeigt. Toll ist auch, dass auch Kommazahlen angezeigt werden können und ganz große Zahlen.

## Frequently asked questions about Numbers & Place Value

### What is Zahlen und Stellenwerte?

Zahlen und Stellenwerte is an interactive app designed to help users understand the concept of place value and numbers. It functions as an experimentation environment rather than a simple practice app, allowing for hands-on exploration of mathematical concepts.

### How does Zahlen und Stellenwerte help with learning math?

By allowing users to manipulate individual place values, observe bundling and unbundling, and visualize numbers in various formats, the app builds a strong foundation for more advanced mathematical topics like arithmetic strategies and decimal numbers.

### What are the different ways numbers can be represented in Zahlen und Stellenwerte?

The app offers several visual representations for place value quantities, including number tokens, Dienes blocks, Euro currency, and calculation grids, allowing users to choose the method that best suits their learning style.

### Can Zahlen und Stellenwerte read numbers aloud?

Yes, the app features a speaker icon that allows you to have the displayed number read aloud. There's also a speech bubble with a checkmark that reads the number and verifies if you have spoken it correctly.

### What is the maximum number range supported by Zahlen und Stellenwerte?

Zahlen und Stellenwerte supports numbers up to 100 trillion. Users can also adjust the number range by showing or hiding additional place values using the grey arrows on the left side of the screen.

### Does Zahlen und Stellenwerte support decimal numbers?

Yes, the app allows for the representation of decimal numbers. You can shift the comma by using the grey arrow to the right of the ones place, enabling exploration of fractional values.

### What age rating does Zahlen und Stellenwerte have?

Zahlen und Stellenwerte has an age rating of 4+. It is designed to be accessible for young learners and is available on iPhone, iPad, and iPod devices.

### How often is Zahlen und Stellenwerte updated?

The latest version of Zahlen und Stellenwerte is 1.3, which was last updated on April 6, 2026. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 1.4 — 2026-09-20

New in 1.4
- English version with English number words, speech output and speech input – including "Say Ten" number words
- Settings right in the app: thousands separator, place labels, number words, speech rate; show or hide tools and representations
- Share a setup or task with your class via QR code
- Protect settings (long press)
- Smoother animations and many improvements

### 1.3 — 2026-04-06

Neu         
- Zahlwort-Anzeige: Über der Zahl wird das Zahlwort in den passenden Stellenwertfarben angezeigt und synchron aktualisiert.
- Einstellungen direkt in der App (nicht nur über Systemeinstellungen)
- bereit für iOS 26                                       

Verbessert                                                                                                                       
  - Nachkommastellen werden im Stellenwertmaterial mathematisch korrekt dargestellt: Der Einer ist immer ein Würfel, Zehntel sind Platten, Hundertstel sind Stangen – mit korrektem Farb-Dreierzyklus.                                             
  - Bündelungsanimationen im Stellenwertmaterial zeigen die Quell- und Zielform klar unterscheidbar an.                                                                                                           
  - Stabilitätsverbesserungen und Speicheroptimierungen.

### 1.2 — 2022-10-01

Es wurden einige kleine Fehler behoben und einige Grafiken leicht angepasst.

### 1.1 — 2022-10-01

Einige Darstellungsfehler behoben.

### 1.0 — 2022-08-31

No release notes.

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## More apps by Christian Urff

- [hundreds frame](https://appshunter.io/ios/app/hundreds-frame/id423532149)
- [Finger Numbers](https://appshunter.io/ios/app/finger-numbers/id455497654)
- [Numbers up to 100](https://appshunter.io/ios/app/numbers-up-to-100/id481817245)
- [Twenty frame for iPad](https://appshunter.io/ios/app/twenty-frame-for-ipad/id556083423)
- [Math Tablet](https://appshunter.io/ios/app/math-tablet/id574825573)
- [Calculation Triangle](https://appshunter.io/ios/app/calculation-triangle/id575736731)

All apps by Christian Urff: https://appshunter.io/developer/415894463

## Related topics

[zahlen und stellenwerte](https://appshunter.io/ios/topics/zahlen-und-stellenwerte)

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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 2026-09-21.*