# Sum vs Retro Rows

The clearest difference is in-app purchases: Retro Rows at none against Sum's 1. Retro Rows also leads on iOS requirement (14.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sum sells 1 in-app purchase, starting at $1.99 per month. Retro Rows asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sum | Retro Rows |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | Every 3 days |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 16 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Whimseed Studio Private Limited](https://appshunter.io/developer/1668117901) | [Narek Sahakyan](https://appshunter.io/developer/1733196119) |

## What reviewers say

### 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 |


### Retro Rows

[App page](https://appshunter.io/ios/app/retro-rows/id6478527683)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sum free?

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

### Is Retro Rows free?

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

### Do Sum or Retro Rows have ads?

Both Sum and Retro Rows show ads.

### Which is updated more often, Sum or Retro Rows?

Sum ships an update every 3 days, and Retro Rows every 3 days. Most recently, Sum was updated on October 24, 2026 and Retro Rows on October 30, 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.*