# Spell That vs Let's Build Sentences

The clearest difference is in-app purchases: Spell That at none against Let's Build Sentences's 1. Spell That also leads on update cadence (every 2 days vs every 4 days) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Let's Build Sentences sells 1 one-off in-app purchase. Spell That asks for nothing beyond the download.

Spell That ships an update every 2 days, Let's Build Sentences every 4 days. Both last shipped on October 6, 2026.

## The numbers

| Metric | Spell That | Let's Build Sentences |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 4 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tony Swann](https://appshunter.io/developer/1510514927) | [Brian Leary](https://appshunter.io/developer/1869693110) |

## What reviewers say

### Spell That

[App page](https://appshunter.io/ios/app/spell-that/id6740571476)

**Features:** macOS Compatibility

**In-app purchases:** none


### Let's Build Sentences

[App page](https://appshunter.io/ios/app/lets-build-sentences/id6761413051)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Spell That free?

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

### Is Let's Build Sentences free?

Let's Build Sentences is free to download, with in-app purchases available.

### Do Spell That or Let's Build Sentences have ads?

Neither Spell That nor Let's Build Sentences shows ads.

### Which is updated more often, Spell That or Let's Build Sentences?

Spell That ships an update every 2 days, and Let's Build Sentences every 4 days. Most recently, Spell That was updated on October 6, 2026 and Let's Build Sentences on October 6, 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.*