# Sumalo vs Lattern

The clearest difference is in-app purchases: Sumalo at none against Lattern's 4. Sumalo also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). Lattern's advantage is update cadence (every 3 days vs every 9 days). On price and device support there is nothing between them.

Both are free to download. Lattern sells 4 in-app purchases, starting at $2.99 per 7 days. Sumalo asks for nothing beyond the download.

Sumalo ships an update every 9 days, Lattern every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sumalo | Lattern |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Free | — |
| Size | 141 MB | 24 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Daniel Salamanca Garcia](https://appshunter.io/developer/1893035879) | [J AND B CREATIONS LLC](https://appshunter.io/developer/1895160810) |

## What reviewers say

### Sumalo

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

Engage in fast-paced mental math challenges and compete against others. Master number puzzles through various game modes, leagues, and rankings to test your speed and accuracy.

**Highlights:** Mental math duels, Multiple game modes, Leagues and seasons, Global rankings, Achievements and rewards, Statistics tracking

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

**In-app purchases:** none


### Lattern

[App page](https://appshunter.io/ios/app/lattern-memory-grid-puzzle/id6775867842)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lattern+ Weekly | $2.99 | per 7 days |
| Lattern+ Yearly | $19.99 | per year |
| Remove Ads | $2.99 | one-time |
| Lattern+ Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Sumalo free?

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

### Is Lattern free?

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

### Do Sumalo or Lattern have ads?

Lattern shows ads; Sumalo does not.

### Which is updated more often, Sumalo or Lattern?

Sumalo ships an update every 9 days, and Lattern every 3 days. Most recently, Sumalo was updated on October 31, 2026 and Lattern on November 5, 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.*