# Sum vs PlusOne

The clearest difference is update cadence: PlusOne at daily against Sum's every 3 days. On price, ads, in-app purchases 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 and PlusOne sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sum ships an update every 3 days, PlusOne daily. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Sum | PlusOne |
| --- | --- | --- |
| 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 | Yes | Yes |
| Update frequency | Every 3 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 9 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Whimseed Studio Private Limited](https://appshunter.io/developer/1668117901) | [WeStudy L.L.C.](https://appshunter.io/developer/789622315) |

## 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 |


### PlusOne

[App page](https://appshunter.io/ios/app/plusone-math/id6745531772)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 15 Vs Credits | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Sum free?

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

### Is PlusOne free?

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

### Do Sum or PlusOne have ads?

Both Sum and PlusOne show ads.

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

Sum ships an update every 3 days, and PlusOne daily. Most recently, Sum was updated on October 13, 2026 and PlusOne on October 20, 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.*