# Number Builder vs NumberSlam®

The clearest difference is update cadence: NumberSlam® at every 6 days against Number Builder's every 39 months. NumberSlam® also leads on iOS requirement (13.0 vs 17.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Number Builder sells 1 one-off in-app purchase and NumberSlam® sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Number Builder against 5.0 for NumberSlam®. Both are backed by a comparable volume of ratings — 7 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Number Builder ships an update every 39 months, NumberSlam® every 6 days. The most recent releases landed on August 12, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Number Builder | NumberSlam® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/number-builder-puzzle-solver/id1489526164/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/numberslam/id1618839777/reviews)** |
| Number of ratings | 7 | 7 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 6 days** |
| Monetization | Free | Free |
| Size | 4 MB | 31 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Widgetilities LLC](https://appshunter.io/developer/1373578566) | [PIRUX, LLC](https://appshunter.io/developer/1618629503) |

## What reviewers say

### Number Builder

[App page](https://appshunter.io/ios/app/number-builder-puzzle-solver/id1489526164)

This app helps solve math puzzles by calculating all possible equations from dice rolls and a target number. It supports basic arithmetic, powers, and roots, making it a useful tool for games like Number Knockout.

**Highlights:** Calculates all possible solutions, Supports basic arithmetic, Includes powers and roots, Input dice rolls and target number, Useful for Number Knockout game

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Challenge Mode | $1.99 | one-time |


### 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 |


## Frequently asked questions

### Is Number Builder free?

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

### Is NumberSlam® free?

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

### Which has better reviews, Number Builder or NumberSlam®?

NumberSlam® is rated higher. Number Builder averages 4.9 out of 5 from 7 ratings, while NumberSlam® averages 5.0 from 7 ratings.

### Do Number Builder or NumberSlam® have ads?

Neither Number Builder nor NumberSlam® shows ads.

### Which is updated more often, Number Builder or NumberSlam®?

Number Builder ships an update every 39 months, and NumberSlam® every 6 days. Most recently, Number Builder was updated on August 12, 2026 and NumberSlam® on June 1, 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.*