# Marbles PS RH+ vs Sum

The clearest difference is ads: Marbles PS RH+ at none against Sum's shown. Marbles PS RH+ also leads on iOS requirement (15.0 vs 17.6). Sum's advantage is update cadence (every 3 days vs every 25 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Marbles PS RH+ sells 1 one-off in-app purchase and Sum sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Marbles PS RH+ ships an update every 25 months, Sum every 3 days. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Marbles PS RH+ | Sum |
| --- | --- | --- |
| Price | Free | 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 | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 113 MB | 20 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RH POZITIF TEKNOLOJI AS](https://appshunter.io/developer/1770083912) | [Whimseed Studio Private Limited](https://appshunter.io/developer/1668117901) |

## What reviewers say

### Marbles PS RH+

[App page](https://appshunter.io/ios/app/marbles-ps-rh-plus/id1596446170)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### 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 Marbles PS RH+ free?

Marbles PS RH+ is free to download, with in-app purchases available.

### Is Sum free?

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

### Do Marbles PS RH+ or Sum have ads?

Sum shows ads; Marbles PS RH+ does not.

### Which is updated more often, Marbles PS RH+ or Sum?

Marbles PS RH+ ships an update every 25 months, and Sum every 3 days. Most recently, Marbles PS RH+ was updated on October 5, 2026 and Sum on October 13, 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.*