# AIoT Heart vs Lattern

The clearest difference is in-app purchases: AIoT Heart at none against Lattern's 5. AIoT Heart also leads on ads (none vs shown). Lattern's advantage is update cadence (every 3 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Lattern sells 5 in-app purchases, starting at $2.99 per 7 days. AIoT Heart asks for nothing beyond the download.

AIoT Heart ships an update every 2 months, Lattern every 3 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AIoT Heart | Lattern |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 241 MB | 24 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 9+ | +12 |
| Developer | [Jon-Chao Hong](https://appshunter.io/developer/547495524) | [J&B Creations LLC](https://appshunter.io/developer/1895160810) |

## What reviewers say

### AIoT Heart

[App page](https://appshunter.io/ios/app/aiot-heart-attack/id6740808938)

**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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lattern+ Weekly | $2.99 | per 7 days |
| Lattern+ Monthly | $4.99 | per month |
| Lattern+ Yearly | $19.99 | per year |
| Remove Ads | $2.99 | one-time |
| Lattern+ Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is AIoT Heart free?

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

### Is Lattern free?

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

### Do AIoT Heart or Lattern have ads?

Lattern shows ads; AIoT Heart does not.

### Which is updated more often, AIoT Heart or Lattern?

AIoT Heart ships an update every 2 months, and Lattern every 3 days. Most recently, AIoT Heart was updated on October 28, 2026 and Lattern on October 25, 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.*