# Sum Is vs Sum

The clearest difference is in-app purchases: Sum Is at none against Sum's 1. Sum Is also leads on iOS requirement (15.0 vs 17.6). Sum's advantage is update cadence (every 3 days vs every 4 months). On price, 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. Sum Is asks for nothing beyond the download.

Sum Is ships an update every 4 months, Sum every 3 days. The most recent releases landed on September 22, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Sum Is | 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 | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 43 MB | 20 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vijay Kumar Meena](https://appshunter.io/developer/1502353944) | [Rajat Vaghani](https://appshunter.io/developer/1668117901) |

## What reviewers say

### Sum Is

[App page](https://appshunter.io/ios/app/sum-is/id1548187986)

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

**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 Sum Is free?

Sum Is is free to download, with no in-app purchases.

### Is Sum free?

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

### Do Sum Is or Sum have ads?

Both Sum Is and Sum show ads.

### Which is updated more often, Sum Is or Sum?

Sum Is ships an update every 4 months, and Sum every 3 days. Most recently, Sum Is was updated on September 22, 2026 and Sum on August 31, 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.*