# Fraction Challenge vs Backshift

The clearest difference is review sentiment: Backshift at 100% against Fraction Challenge's 70%. On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Fraction Challenge sells 1 one-off in-app purchase and Backshift sells 2 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Fraction Challenge | Backshift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.5K ratings)](https://appshunter.io/ios/app/fraction-challenge/id1499338364/reviews)** | — |
| Number of ratings | **1.5K** | — |
| Positive reviews | 70.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | Freemium |
| Size | 89 MB | 22 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Didactoons Games SL](https://appshunter.io/developer/1457185685) | [Iris Radoi](https://appshunter.io/developer/1867296245) |

## What reviewers say

### Fraction Challenge

[App page](https://appshunter.io/ios/app/fraction-challenge/id1499338364)

Engage in fun math games designed to teach and reinforce fraction operations. Practice addition, subtraction, multiplication, and division of fractions through interactive challenges. Compete with friends in multiplayer mode to boost mental calculation skills.

**Highlights:** Fraction representation, Addition and subtraction of fractions, Equivalent fractions, Fraction reduction, Multiplication and division of fractions, Multiplayer mode

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get the Full version | $1.99 | one-time |

**What reviewers like**

- 👍 Helps with learning fractions
- 🚀 Fun and engaging game
- 💡 Good for practicing and preparing for tests
- 👍 Competitive and challenging

**What reviewers complain about**

- 🐛 App crashes or doesn't open
- 🕰️ Timer is too fast
- 💰 Not free to play

**Reported bugs**

- App crashes on launch
- Login issues

**Requested features**

- Option to remove timer or increase time
- More game modes (e.g., divided fractions, add/subtract fractions, multiply)
- No battery required to play


### Backshift

[App page](https://appshunter.io/ios/app/backshift-dual-n-back/id6757496082)

This app trains your working memory with a dual N-back exercise. It challenges you to recall positions and sounds from previous steps, adapting difficulty as you improve. Daily practice and streak tracking help build consistency for enhanced cognitive function.

**Highlights:** Adaptive difficulty adjustment, Progress tracking and accuracy trends, Daily streak tracking, Customizable session duration and speed, Daily training reminders, Multiple audio packs (letters/numbers)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Levels (Monthly) | $0.49 | per month |
| Advanced Levels (Yearly) | $4.99 | per year |


## Frequently asked questions

### Is Fraction Challenge free?

Fraction Challenge is free to download, with in-app purchases available.

### Is Backshift free?

Backshift is free to download, with in-app purchases available.

### Do Fraction Challenge or Backshift have ads?

Neither Fraction Challenge nor Backshift shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*