# RiddleSum vs Number Sum Up

RiddleSum and Number Sum Up both sit at 4.6 stars, but that hides the real split: 100% of Number Sum Up's written reviews are positive against 0% of RiddleSum's. Number Sum Up also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 months). RiddleSum's advantage is monetization model (ad-supported vs free with in-app purchases). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. RiddleSum sells 1 one-off in-app purchase and Number Sum Up 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 — 4.6 for RiddleSum against 4.6 for Number Sum Up. Both are backed by a comparable volume of ratings — 10 and 19 respectively. Written reviews are what separate them: 0% of RiddleSum's written reviews are positive against 100% of Number Sum Up's.

RiddleSum ships an update every 2 months, Number Sum Up every 3 days. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | RiddleSum | Number Sum Up |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/riddlesum-math-puzzle/id6474078443/reviews) | **[4.6 (19 ratings)](https://appshunter.io/ios/app/number-sum-up-quick-math/id6502631525/reviews)** |
| Number of ratings | 10 | **19** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 20 MB | 197 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Romanov](https://appshunter.io/developer/689955162) | [ALICE GAMES](https://appshunter.io/developer/1726187276) |

## What reviewers say

### RiddleSum

[App page](https://appshunter.io/ios/app/riddlesum-math-puzzle/id6474078443)

This number puzzle game challenges you to balance rows and columns by selecting the correct numbers. It offers a relaxing, clean design with hundreds of handcrafted puzzles to sharpen logic and mental math skills at your own pace.

**Highlights:** Hundreds of handcrafted puzzles, Clean and minimal design, Helpful hints, No timers, solve at your own pace, Daily brain workout, Logic and mental math training

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Number Sum Up

[App page](https://appshunter.io/ios/app/number-sum-up-quick-math/id6502631525)

Solve number puzzles by circling and erasing digits to make rows and columns add up to target sums. This game offers a clean design and varying difficulty levels to sharpen your mental math skills.

**Highlights:** Circle and erase numbers, Solve row and column sum puzzles, Multiple difficulty levels, Varying board sizes, Hint system, Clean and simple design

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is RiddleSum free?

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

### Is Number Sum Up free?

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

### Which has better reviews, RiddleSum or Number Sum Up?

Number Sum Up is rated higher. RiddleSum averages 4.6 out of 5 from 10 ratings, while Number Sum Up averages 4.6 from 19 ratings.

### Do RiddleSum or Number Sum Up have ads?

RiddleSum shows ads; Number Sum Up does not.

### Which is updated more often, RiddleSum or Number Sum Up?

RiddleSum ships an update every 2 months, and Number Sum Up every 3 days. Most recently, RiddleSum was updated on September 15, 2026 and Number Sum Up on September 9, 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.*