# The Letter Flash Machine vs Smart Science

The clearest difference is price: Smart Science at Free against The Letter Flash Machine's $0.99. Smart Science also leads on update cadence (monthly vs every 31 months). The Letter Flash Machine's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Smart Science is free to download; The Letter Flash Machine costs $0.99 up front. Smart Science sells 1 one-off in-app purchase. The Letter Flash Machine asks for nothing beyond the download.

The Letter Flash Machine ships an update every 31 months, Smart Science monthly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | The Letter Flash Machine | Smart Science |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-letter-flash-machine/id1005102385/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Monthly** |
| Monetization | Paid | — |
| Size | 15 MB | 190 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Oxford EduVision (M)](https://appshunter.io/developer/1784194586) |

## What reviewers say

### The Letter Flash Machine

[App page](https://appshunter.io/ios/app/the-letter-flash-machine/id1005102385)

This app helps young children learn to recognize alphabet letters through interactive keyboard matching and picture-based letter identification. It tracks performance and uses sound effects to enhance the learning experience.

**Highlights:** Letter recognition games, Keyboard matching activity, Picture-based letter identification, Performance tracking, Pronouncing letters, Sound effects for engagement

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

**In-app purchases:** none


### Smart Science

[App page](https://appshunter.io/ios/app/smart-science/id6752447215)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Science Full Version | Free | one-time |


## Frequently asked questions

### Is The Letter Flash Machine free?

The Letter Flash Machine costs $0.99, with no in-app purchases.

### Is Smart Science free?

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

### Do The Letter Flash Machine or Smart Science have ads?

Neither The Letter Flash Machine nor Smart Science shows ads.

### Which is updated more often, The Letter Flash Machine or Smart Science?

The Letter Flash Machine ships an update every 31 months, and Smart Science monthly. Most recently, The Letter Flash Machine was updated on October 29, 2026 and Smart Science on October 30, 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.*