# Adaptivity (A) vs RETRO FORTH

The clearest difference is review sentiment: Adaptivity (A) at 94% against RETRO FORTH's 33%. Adaptivity (A) also leads on rating (5.0 vs 4.4) and ratings volume (92 vs 5). RETRO FORTH's advantage is price (Free vs $7.99) and in-app purchases (none vs 4). On update cadence, ads and iOS requirement there is nothing between them.

RETRO FORTH is free to download; Adaptivity (A) costs $7.99 up front. Adaptivity (A) sells 4 one-off in-app purchases. RETRO FORTH asks for nothing beyond the download.

Adaptivity (A) holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Adaptivity (A) has 92 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 94% of Adaptivity (A)'s written reviews are positive against 33% of RETRO FORTH's.

Adaptivity (A) ships an update every 3 weeks, RETRO FORTH monthly. The most recent releases landed on September 25, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Adaptivity (A) | RETRO FORTH |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[5.0 (92 ratings)](https://appshunter.io/ios/app/adaptivity-a/id1054670022/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/retro-forth/id1170943580/reviews) |
| Number of ratings | **92** | 5 |
| Positive reviews | **94.3% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#70** | — |
| Size | 46 MB | 4 MB |
| Requires iOS | **11.0** | 12.4 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Geoff Hackworth](https://appshunter.io/developer/463855590) | [Charles Childers](https://appshunter.io/developer/900749636) |

## What reviewers say

### Adaptivity (A)

[App page](https://appshunter.io/ios/app/adaptivity-a/id1054670022)

**Currently charting:** #70 Top Paid · Developer Tools (US App Store)

Visualize how app layouts adapt to different screen sizes, orientations, and dynamic text settings on iOS and iPadOS devices. Explore SF Symbols, system colors, fonts, and materials with detailed information and previews.

**Highlights:** Visualize layout sizes and margins, Explore SF Symbols across iOS versions, Preview Dynamic Type styles, View System Colors, Fonts, and Materials, Support for iPad multitasking and external displays, Widget and Siri shortcut integration

**Features:** Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Enormous Tip | $9.99 | one-time |


### RETRO FORTH

[App page](https://appshunter.io/ios/app/retro-forth/id1170943580)

A compact and adaptable concatenative programming language designed for ease of learning and customization. It features a code editor, interactive listener, and support for Gopher servers, allowing for flexible development.

**Highlights:** Concatenative programming language, Code editor with Markdown subset, Literate programming style, Interactive listener interface, Gopher server data fetching, File manager, Documentation browser

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

**In-app purchases:** none


## Frequently asked questions

### Is Adaptivity (A) free?

Adaptivity (A) costs $7.99, and also offers in-app purchases.

### Is RETRO FORTH free?

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

### Which has better reviews, Adaptivity (A) or RETRO FORTH?

Adaptivity (A) is rated higher. Adaptivity (A) averages 5.0 out of 5 from 92 ratings, while RETRO FORTH averages 4.4 from 5 ratings.

### Do Adaptivity (A) or RETRO FORTH have ads?

Neither Adaptivity (A) nor RETRO FORTH shows ads.

### Which is updated more often, Adaptivity (A) or RETRO FORTH?

Adaptivity (A) ships an update every 3 weeks, and RETRO FORTH monthly. Most recently, Adaptivity (A) was updated on September 25, 2026 and RETRO FORTH on September 6, 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.*