# Number Reef: Swim & Learn — Add, Subtract, Multiply & More

> Educational underwater math game for practicing arithmetic skills. (iPhone/iPad app by Jens Somers.)

- Source: https://appshunter.io/ios/app/number-reef-swim-and-learn/id6797616465 (this page in markdown: same URL + `.md`)
- Developer: [Jens Somers](https://appshunter.io/developer/1847195635)
- Category: Games, Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Assamese, Azerbaijani, Basque, Belarusian and 67 more
- Released: 2026-08-12
- Data updated: 2026-08-23
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/number-reef-swim-and-learn/id6797616465/reviews.md

## What is Number Reef?

Learn math while exploring a colourful underwater world.

You are the fish. Swim through the ocean, solve each question, and catch the bubble with the correct answer. Avoid incorrect bubbles, protect your lives, build winning streaks, and collect points to unlock new characters.

LEARN WHILE YOU PLAY

Choose what you want to practise:

• addition
• subtraction
• multiplication
• division
• percentages
• mixed questions

Select the type of questions that suits you and improve your maths skills through play.

CATCH THE CORRECT BUBBLE

Each question appears with several answer bubbles. Swim towards the correct answer and avoid the wrong ones.

Choose carefully. A wrong bubble costs you a life, so stay focused and react quickly.

BUILD A STREAK

Answer five questions correctly in a row to activate a streak and earn double points.

Keep choosing the right answers to maintain your momentum, improve your score, and unlock rewards faster.

WATCH FOR HELPER FISH

Special helper fish sometimes swim across the screen carrying useful bonuses, including:

• point multipliers
• extra lives
• other helpful power-ups

They swim fast, so stay alert and catch them before they disappear.

UNLOCK NEW CHARACTERS

Collect points while you play and use them to unlock new fish characters.

Keep practising, improve your high score, and expand your underwater collection.

PRACTISE AT YOUR OWN LEVEL

Choose the calculations you want to practise and play at a level that matches your ability.

Start with simple sums or challenge yourself with multiplication, division, percentages, and mixed questions.

FOR DIFFERENT AGES AND ABILITIES

• Ages 5–8: practise addition and subtraction
• Ages 9–11: improve times tables and multiplication
• Ages 12+: work on division, percentages, and mixed questions

From first calculations to more challenging exercises, the game makes maths practice active, visual, and fun.

SWIM, SOLVE, AND IMPROVE

Catch the right bubbles, dodge the wrong answers, collect bonuses, unlock new fish, and become faster and more confident at maths with every game.

## Key features

- Underwater exploration gameplay
- Practice addition, subtraction, multiplication, division
- Catch correct answer bubbles
- Build winning streaks for double points
- Unlock new characters with points
- Helper fish with power-ups

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Eenmalige Premium-upgrade | $3.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/number-reef-swim-and-learn/id6797616465/reviews.md

### 5/5 — great app for kids

*2026-08-21*

great app for kids

### 5/5 — Exceptional

*2026-08-21*

My daughter loves this app.

## Frequently asked questions about Number Reef

### What math skills can I practice with Number Reef?

Number Reef allows you to practice addition, subtraction, multiplication, division, percentages, and mixed questions. You can select the specific calculations you want to focus on to suit your learning level.

### How does Number Reef make learning math fun?

The game immerses you in a colorful underwater world where you swim as a fish to catch correct answer bubbles and avoid incorrect ones. This active and visual approach, combined with unlocking new characters and collecting bonuses, makes practicing math engaging.

### What age groups is Number Reef suitable for?

Number Reef is designed for a wide range of ages. Younger children (5-8) can practice addition and subtraction, while older children (9-11) can improve multiplication, and those 12+ can work on division and percentages.

### Can I play Number Reef offline?

The provided data does not specify whether Number Reef supports offline play. It is recommended to check the app store listing for details on offline functionality.

### Does Number Reef have ads?

No, Number Reef does not contain advertisements. The app is free to download and play without any interruptions from ads.

### How often is Number Reef updated?

The latest version of Number Reef was released on 2026-08-18, indicating recent updates. While specific update frequency isn't detailed, the release date suggests ongoing support and improvements.

### What devices can I play Number Reef on?

Number Reef is available on iPhone and iPad devices. This ensures a consistent experience for users across Apple's mobile ecosystem.

### What is the rating for Number Reef?

Number Reef has a high rating of 5.0 stars based on 2 user ratings. This suggests a very positive reception from its current player base.

## Version history (last 3 releases)

### 1.2 — 2026-08-18

Smoother transition from the first install to the first level, along with an improved promotional video.

### 1.1 — 2026-08-17

Improved performance for smoother gameplay, fixed several localization inconsistencies, and added new promotional images and videos.

### 1.0 — 2026-08-12

No release notes.

## More apps by Jens Somers

- [Buzzkill](https://appshunter.io/ios/app/buzzkill/id6754295660)
- [Happy Five](https://appshunter.io/ios/app/happy-five/id6757990326)
- [Famous Chef](https://appshunter.io/ios/app/famous-chef/id6758932844)
- [Forget It](https://appshunter.io/ios/app/forget-it/id6788163617)
- [Jumping Fox: Learn Math](https://appshunter.io/ios/app/jumping-fox-learn-math/id6792367412)

All apps by Jens Somers: https://appshunter.io/developer/1847195635

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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 2026-08-23.*