# Number Therapy Lite vs VDLI

The clearest difference is ratings volume: Number Therapy Lite at 135 against VDLI's 1. Number Therapy Lite also leads on update cadence (every 5 months vs every 20 months) and device support (3 vs 1). VDLI's advantage is rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

VDLI holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Number Therapy Lite has 135 ratings behind it against 1, so its average is the more settled of the two.

Number Therapy Lite ships an update every 5 months, VDLI every 20 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Number Therapy Lite | VDLI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (135 ratings)](https://appshunter.io/ios/app/number-therapy-lite/id1002098877/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vdli/id1450453931/reviews)** |
| Number of ratings | **135** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 20 months |
| Monetization | Free | Free |
| Size | 7 MB | 37 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tactus Therapy Solutions Ltd.](https://appshunter.io/developer/438070002) | [Raj Persaud](https://appshunter.io/developer/1450453930) |

## What reviewers say

### Number Therapy Lite

[App page](https://appshunter.io/ios/app/number-therapy-lite/id1002098877)

Practice understanding, saying, and typing numbers to improve essential communication skills. This app helps stroke survivors and others gain independence by strengthening their ability to communicate numbers in various contexts.

**Highlights:** Number comprehension practice, Speech and pronunciation exercises, Typing numbers, Customizable interface, Progress tracking, Evidence-based approach

**In-app purchases:** none


### VDLI

[App page](https://appshunter.io/ios/app/vdli/id1450453931)

This application facilitates discussions about the sounds and words a child is currently producing. It serves as a tool to help understand and document a child's vocal development.

**Highlights:** Vocal development tracking, Speech sound analysis, Word production documentation, Child communication aid

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Number Therapy Lite free?

Number Therapy Lite is free to download, with no in-app purchases.

### Is VDLI free?

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

### Which has better reviews, Number Therapy Lite or VDLI?

VDLI is rated higher. Number Therapy Lite averages 4.8 out of 5 from 135 ratings, while VDLI averages 5.0 from 1 ratings.

### Do Number Therapy Lite or VDLI have ads?

Neither Number Therapy Lite nor VDLI shows ads.

### Which is updated more often, Number Therapy Lite or VDLI?

Number Therapy Lite ships an update every 5 months, and VDLI every 20 months. Most recently, Number Therapy Lite was updated on October 24, 2026 and VDLI on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*