# Scan vs Keywords Understanding Lite

The clearest difference is in-app purchases: Keywords Understanding Lite at none against Scan's 1. Keywords Understanding Lite also leads on device support (3 vs 1). Scan's advantage is update cadence (every 6 months vs every 68 months) and iOS requirement (11.0 vs 15.0). On price and ads there is nothing between them.

Both are free to download. Scan sells 1 one-off in-app purchase. Keywords Understanding Lite asks for nothing beyond the download.

Scan ships an update every 6 months, Keywords Understanding Lite every 68 months. The most recent releases landed on May 16, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Scan | Keywords Understanding Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/keywords-understanding-lite/id1537440607/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 68 months |
| Monetization | — | Free |
| Size | 47 MB | 60 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RJ Cooper & Associates, Inc.](https://appshunter.io/developer/412790299) | [Aptus Speech and Language Therapy Limited](https://appshunter.io/developer/1482673468) |

## What reviewers say

### Scan

[App page](https://appshunter.io/ios/app/scan-a-word-lite/id504925264)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Full Version of Scan-A-Word | $4.99 | one-time |


### Keywords Understanding Lite

[App page](https://appshunter.io/ios/app/keywords-understanding-lite/id1537440607)

This app offers a sample of speech and language therapy exercises focused on sentence comprehension. It helps users practice following directions, understanding basic concepts, and improving auditory and reading comprehension skills through interactive activities.

**Highlights:** Listening comprehension exercises, Reading comprehension exercises, Following directions (one/two-step, temporal, sequential), Basic concepts (size, color), Vocabulary understanding, Sample of full app features

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scan free?

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

### Is Keywords Understanding Lite free?

Keywords Understanding Lite is free to download, with no in-app purchases.

### Do Scan or Keywords Understanding Lite have ads?

Neither Scan nor Keywords Understanding Lite shows ads.

### Which is updated more often, Scan or Keywords Understanding Lite?

Scan ships an update every 6 months, and Keywords Understanding Lite every 68 months. Most recently, Scan was updated on May 16, 2026 and Keywords Understanding Lite on August 12, 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.*