# Experia IRiS+ App vs Letter Formation

The clearest difference is in-app purchases: Experia IRiS+ App at none against Letter Formation's 1. Experia IRiS+ App also leads on iOS requirement (8.0 vs 15.0). Letter Formation's advantage is update cadence (every 9 days vs every 17 months). On price, ads and device support there is nothing between them.

Both are free to download. Letter Formation sells 1 one-off in-app purchase. Experia IRiS+ App asks for nothing beyond the download.

Experia IRiS+ App ships an update every 17 months, Letter Formation every 9 days. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Experia IRiS+ App | Letter Formation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/letter-formation/id1612241705/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 26 MB | 30 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Experia](https://appshunter.io/developer/550809669) | [UPTOSIX KIDS PRIVATE LIMITED](https://appshunter.io/developer/1612241977) |

## What reviewers say

### Experia IRiS+ App

[App page](https://appshunter.io/ios/app/experia-iris-plus-app/id550809526)

**Features:** macOS Compatibility

**In-app purchases:** none


### Letter Formation

[App page](https://appshunter.io/ios/app/letter-formation/id1612241705)

This educational game teaches preschoolers and kindergarteners how to write letters and numbers with correct formation. It uses animations and tracing exercises to guide children, focusing on independent learning without auto-correction. The app also introduces concepts of letter sizing and placement within four-line writing grids.

**Highlights:** Alphabet and number tracing, Correct letter formation guidance, Four-line writing practice, Pre-writing fine motor skill exercises, Uppercase and lowercase letters, Chicken, Giraffe, and Monkey letter guides

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One payment to unlock all | $34.99 | one-time |


## Frequently asked questions

### Is Experia IRiS+ App free?

Experia IRiS+ App is free to download, with no in-app purchases.

### Is Letter Formation free?

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

### Do Experia IRiS+ App or Letter Formation have ads?

Neither Experia IRiS+ App nor Letter Formation shows ads.

### Which is updated more often, Experia IRiS+ App or Letter Formation?

Experia IRiS+ App ships an update every 17 months, and Letter Formation every 9 days. Most recently, Experia IRiS+ App was updated on October 15, 2026 and Letter Formation 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.*