# Phonology vs Keywords Understanding Lite

The clearest difference is price: Keywords Understanding Lite at Free against Phonology's $5.99. Phonology's advantage is update cadence (every 10 months vs every 68 months) and iOS requirement (9.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Keywords Understanding Lite is free to download; Phonology costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phonology ships an update every 10 months, Keywords Understanding Lite every 68 months. The most recent releases landed on August 31, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Phonology | Keywords Understanding Lite |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/keywords-understanding-lite/id1537440607/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 68 months |
| Monetization | Paid | **Free** |
| Size | 49 MB | 60 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Learning Fundamentals, Inc.](https://appshunter.io/developer/454061076) | [Aptus Speech and Language Therapy Limited](https://appshunter.io/developer/1482673468) |

## What reviewers say

### Phonology

[App page](https://appshunter.io/ios/app/phonology/id520865935)

This app provides speech therapy exercises for children aged 3-5 with unintelligible speech. It uses auditory discrimination activities and colorful visuals to help children distinguish and produce sounds, based on the Hodson model of Phonological Processing.

**Highlights:** Auditory discrimination activities, Speech intelligibility practice, Colorful drawings, Hodson model based, Speech model imitation, Record and playback feature, Multiple scoring methods

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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 Phonology free?

Phonology costs $5.99, with no in-app purchases.

### Is Keywords Understanding Lite free?

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

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

Neither Phonology nor Keywords Understanding Lite shows ads.

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

Phonology ships an update every 10 months, and Keywords Understanding Lite every 68 months. Most recently, Phonology was updated on August 31, 2026 and Keywords Understanding Lite on September 17, 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.*