# Obradovic Lab AMES vs PixWriter Lite

The clearest difference is in-app purchases: Obradovic Lab AMES at none against PixWriter Lite's 1. Obradovic Lab AMES also leads on iOS requirement (11.0 vs 15.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. PixWriter Lite sells 1 one-off in-app purchase. Obradovic Lab AMES asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Obradovic Lab AMES against 5.0 for PixWriter Lite. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Obradovic Lab AMES ships an update every 5 months, PixWriter Lite every 4 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Obradovic Lab AMES | PixWriter Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/obradovic-lab-ames/id1347960558/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/pixwriter-lite/id1462673663/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 342 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stanford University](https://appshunter.io/developer/292922032) | [Attainment Company](https://appshunter.io/developer/403989333) |

## What reviewers say

### Obradovic Lab AMES

[App page](https://appshunter.io/ios/app/obradovic-lab-ames/id1347960558)

This iPad application is designed for researchers to assess executive functions and delay of gratification in children. It features three distinct tasks and has been validated with children aged 4-12 across multiple countries.

**Highlights:** Executive function assessment, Delay of gratification tasks, Child-focused research tool, Validated with ages 4-12, Cross-cultural testing

**Features:** macOS Compatibility

**In-app purchases:** none


### PixWriter Lite

[App page](https://appshunter.io/ios/app/pixwriter-lite/id1462673663)

This picture-assisted writing tool helps beginning writers of any age compose documents independently. Students can select word bank buttons or type with a keyboard, with symbols automatically added. The Lite version can receive files from the full PixWriter app for reading aloud and printing.

**Highlights:** Picture-assisted writing, Symbol support, Highlighted text and speech, Customizable vocabulary word banks, Receive files from full PixWriter app, Read aloud functionality

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $69.99 | one-time |


## Frequently asked questions

### Is Obradovic Lab AMES free?

Obradovic Lab AMES is free to download, with no in-app purchases.

### Is PixWriter Lite free?

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

### Which has better reviews, Obradovic Lab AMES or PixWriter Lite?

Obradovic Lab AMES and PixWriter Lite are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Obradovic Lab AMES or PixWriter Lite have ads?

Neither Obradovic Lab AMES nor PixWriter Lite shows ads.

### Which is updated more often, Obradovic Lab AMES or PixWriter Lite?

Obradovic Lab AMES ships an update every 5 months, and PixWriter Lite every 4 months. Most recently, Obradovic Lab AMES was updated on November 4, 2026 and PixWriter Lite on November 3, 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.*