# Sum 12 vs Sumalo

The clearest difference is in-app purchases: Sumalo at none against Sum 12's 1. Sumalo also leads on ads (none vs shown) and update cadence (weekly vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Sum 12 sells 1 one-off in-app purchase. Sumalo asks for nothing beyond the download.

Sum 12 ships an update every 3 months, Sumalo weekly. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Sum 12 | Sumalo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sumalo-fast-mental-math/id6762127607/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Free |
| Size | 46 MB | 120 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vitalij Schaefer](https://appshunter.io/developer/393749449) | [Daniel Salamanca Garcia](https://appshunter.io/developer/1893035879) |

## What reviewers say

### Sum 12

[App page](https://appshunter.io/ios/app/sum-12/id6738145230)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $5.99 | one-time |


### Sumalo

[App page](https://appshunter.io/ios/app/sumalo-fast-mental-math/id6762127607)

Engage in a fast-paced mental math challenge using the reduced sum technique. Test your reflexes across eight unique game modes and compete in seasonal rankings to improve focus and calculation speed.

**Highlights:** Reduced sum technique, Eight unique game modes, Seasonal rankings and ELO system, Real-time duels with friends, Detailed performance statistics, Cognitive training for focus and memory

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

**In-app purchases:** none


## Frequently asked questions

### Is Sum 12 free?

Sum 12 is free to download, with in-app purchases available.

### Is Sumalo free?

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

### Do Sum 12 or Sumalo have ads?

Sum 12 shows ads; Sumalo does not.

### Which is updated more often, Sum 12 or Sumalo?

Sum 12 ships an update every 3 months, and Sumalo weekly. Most recently, Sum 12 was updated on September 8, 2026 and Sumalo on September 15, 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.*