# NumberSlam® vs IEW Writing Toolbox

The clearest difference is price: NumberSlam® at Free against IEW Writing Toolbox's $1.99. NumberSlam® also leads on update cadence (every 6 days vs every 5 weeks) and ratings volume (8 vs 2). IEW Writing Toolbox's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.8). On review sentiment, ads, device support and iOS requirement there is nothing between them.

NumberSlam® is free to download; IEW Writing Toolbox costs $1.99 up front. NumberSlam® sells 1 one-off in-app purchase. IEW Writing Toolbox asks for nothing beyond the download.

IEW Writing Toolbox holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

NumberSlam® ships an update every 6 days, IEW Writing Toolbox every 5 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | NumberSlam® | IEW Writing Toolbox |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.8 (8 ratings)](https://appshunter.io/ios/app/numberslam/id1618839777/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/iew-writing-toolbox/id6753764743/reviews)** |
| Number of ratings | **8** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#159** |
| Size | 31 MB | 53 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PIRUX, LLC](https://appshunter.io/developer/1618629503) | [Institute for Excellence in Writing](https://appshunter.io/developer/587466824) |

## What reviewers say

### NumberSlam®

[App page](https://appshunter.io/ios/app/numberslam/id1618839777)

This is a fast-paced mental math game designed to enhance your calculation skills on mobile. It's a digital adaptation of a popular classroom game, offering an engaging way to practice math for fun or improvement. The game is ad-free and tracks no user data for a safe, distraction-free experience.

**Highlights:** Improves mental math skills, Engaging and fast-paced gameplay, Digital remake of a popular classroom game, Ad-free experience, Tracking-free for user privacy, Suitable for practice or fun

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Activate NumberSlam | $7.99 | one-time |


### IEW Writing Toolbox

[App page](https://appshunter.io/ios/app/iew-writing-toolbox/id6753764743)

**Currently charting:** #159 Top Paid · Education (US App Store)

Enhance writing with structural models and stylistic techniques. Features a focused thesaurus to find descriptive words and improve compositions. Offers a convenient, all-in-one resource for students and teachers.

**Highlights:** IEW structural models, Stylistic techniques explained, Focused thesaurus, Search for adverbs, verbs, adjectives, Enhance composition

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

**In-app purchases:** none


## Frequently asked questions

### Is NumberSlam® free?

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

### Is IEW Writing Toolbox free?

IEW Writing Toolbox costs $1.99, with no in-app purchases.

### Which has better reviews, NumberSlam® or IEW Writing Toolbox?

IEW Writing Toolbox is rated higher. NumberSlam® averages 4.8 out of 5 from 8 ratings, while IEW Writing Toolbox averages 5.0 from 2 ratings.

### Do NumberSlam® or IEW Writing Toolbox have ads?

Neither NumberSlam® nor IEW Writing Toolbox shows ads.

### Which is updated more often, NumberSlam® or IEW Writing Toolbox?

NumberSlam® ships an update every 6 days, and IEW Writing Toolbox every 5 weeks. Most recently, NumberSlam® was updated on October 24, 2026 and IEW Writing Toolbox on October 30, 2026.

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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.*