Number Builder vs SumSlam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Builder
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.
- Calculates all possible solutions
- Supports basic arithmetic
- Includes powers and roots
- Input dice rolls and target number
- Useful for Number Knockout game
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Number Builder turns dice rolls into a hands-on way to practice mental math. SOLVE MODE Roll three dice, enter a target number, and see every way to combine your dice — using addition, subtraction, multiplication, division, exponents, and roots — to reach it. Great for checking your own work or discovering paths you hadn't thought of. CHALLENGE MODE Roll a set of dice and a target, then build the answer yourself — tapping dice and operators into place, left to right, with instant feedback when you're right. Six levels of difficulty take you from simple addition all the way up to exponents, fractional exponents, and roots, with targets up to 1,000. Challenge mode includes 3 free puzzles to try. After that, it unlocks with a single one-time purchase — no subscriptions, and Family Sharing means one purchase covers your whole family. BUILT FOR PRACTICE Six progressively harder levels, each changing exactly one thing about the challenge Customizable dice colors and styles Full support for larger text sizes and VoiceOver Solve mode stays completely free, no purchase required No data is collected. No ads, ever.
SumSlam
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.
- Swipe-based equation solving
- Productive doom-scrolling alternative
- Math skill enhancement
- Engaging puzzle gameplay
- Designed for all ages
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Swipe the equation of the current answer. Pretty easy, my grannie got it on her second try. The main reason I made this app is to reduce doom scrolling with something that is more productive but also frustrating enough that after a while you want to go back to focusing the task at hand. Our mission at BlueJai is to come up with creative solution to modern problem and always keeping the users at the forefront. Hope you love the app and it makes you a little sharper at math.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Number Builder | SumSlam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 39 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 4 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Widgetilities LLC | BLUEJAI LLC |
Customer experience
Number Builder
SumSlam
In-app purchases
Number Builder
- Unlock Challenge Mode$1.99
SumSlam
No in-app purchases









