# X Ball Enigma vs Sum

The clearest difference is price: Sum at Free against X Ball Enigma's $2.99. X Ball Enigma's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Sum is free to download; X Ball Enigma costs $2.99 up front. Sum sells 1 in-app purchase, starting at $1.99 per month. X Ball Enigma asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | X Ball Enigma | Sum |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sum-math-puzzle-brain-game/id6450458099/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | Every 3 days |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 20 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BUZZI SOFTWARE LTDA](https://appshunter.io/developer/1583298823) | [Whimseed Studio Private Limited](https://appshunter.io/developer/1668117901) |

## What reviewers say

### X Ball Enigma

[App page](https://appshunter.io/ios/app/x-ball-enigma/id1637320845)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sum

[App page](https://appshunter.io/ios/app/sum-math-puzzle-brain-game/id6450458099)

This game challenges you to find sums from a grid of numbers before time runs out. It offers multiple modes, from fast-paced challenges to relaxed untimed play, and helps improve mental agility and logic skills.

**Highlights:** Timed addition challenges, Four distinct game modes, Offline play supported, Compete with friends, Detailed progress statistics, Sleek user interface

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |


## Frequently asked questions

### Is X Ball Enigma free?

X Ball Enigma costs $2.99, with no in-app purchases.

### Is Sum free?

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

### Do X Ball Enigma or Sum have ads?

Both X Ball Enigma and Sum show ads.

### Which is updated more often, X Ball Enigma or Sum?

X Ball Enigma ships an update every 3 days, and Sum every 3 days. Most recently, X Ball Enigma was updated on October 25, 2026 and Sum on October 24, 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.*