# Number Builder vs SumSlam

The clearest difference is in-app purchases: SumSlam at none against Number Builder's 1. SumSlam also leads on update cadence (every 5 days vs every 39 months) and iOS requirement (15.6 vs 17.0). Number Builder's advantage is ratings volume (7 vs 2). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. Number Builder sells 1 one-off in-app purchase. SumSlam asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Number Builder against 5.0 for SumSlam. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

Number Builder ships an update every 39 months, SumSlam every 5 days. The most recent releases landed on October 10, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Number Builder | SumSlam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/number-builder-puzzle-solver/id1489526164/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sumslam/id6742594902/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 4 MB | 13 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Widgetilities LLC](https://appshunter.io/developer/1373578566) | [BLUEJAI LLC](https://appshunter.io/developer/1794845136) |

## 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 |


### SumSlam

[App page](https://appshunter.io/ios/app/sumslam/id6742594902)

Engage with a math-based puzzle game designed to be a productive alternative to endless scrolling. It challenges users to quickly solve equations, aiming to sharpen mathematical skills while providing a mildly frustrating yet engaging experience.

**Highlights:** Swipe-based equation solving, Productive doom-scrolling alternative, Math skill enhancement, Engaging puzzle gameplay, Designed for all ages

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Number Builder free?

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

### Is SumSlam free?

SumSlam is free to download, with no in-app purchases.

### Which has better reviews, Number Builder or SumSlam?

SumSlam is rated higher. Number Builder averages 4.9 out of 5 from 7 ratings, while SumSlam averages 5.0 from 2 ratings.

### Do Number Builder or SumSlam have ads?

Neither Number Builder nor SumSlam shows ads.

### Which is updated more often, Number Builder or SumSlam?

Number Builder ships an update every 39 months, and SumSlam every 5 days. Most recently, Number Builder was updated on October 10, 2026 and SumSlam on September 23, 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.*