# Gravity 6D vs (LispLab)

The clearest difference is price: (LispLab) at Free against Gravity 6D's $1.99. (LispLab) also leads on update cadence (every 2 months vs every 16 months). Gravity 6D's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 26.2). On rating, ratings volume, ads and device support there is nothing between them.

(LispLab) is free to download; Gravity 6D costs $1.99 up front. (LispLab) sells 1 one-off in-app purchase. Gravity 6D asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Gravity 6D against 5.0 for (LispLab). Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Gravity 6D ships an update every 16 months, (LispLab) every 2 months. The most recent releases landed on September 9, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Gravity 6D | (LispLab) |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/gravity-6d/id1620686014/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/lisplab/id6760487669/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 49 MB | 4 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Creetah Ltd.](https://appshunter.io/developer/1091214069) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Gravity 6D

[App page](https://appshunter.io/ios/app/gravity-6d/id1620686014)

Explore advanced physics with this application that allows for the simulation of up to six-dimensional gravity. Customize simulation parameters, adjust speed and visuals, and save your creations for later review.

**Highlights:** 6D mass particle simulations, Customizable simulation setup, Adjustable simulation speed, Visual preference settings, Save simulations

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

**In-app purchases:** none


### (LispLab)

[App page](https://appshunter.io/ios/app/lisplab/id6760487669)

Master the Scheme programming language with structured lessons, a built-in interpreter, and interactive exercises. Track your progress and explore functional programming concepts, including a new module for the beginner-friendly Logo language.

**Highlights:** 90 guided Scheme lessons, Built-in REPL and interpreter, Exercises with hints, Progress tracking, Logo module included, Light/dark themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $0.99 | one-time |


## Frequently asked questions

### Is Gravity 6D free?

Gravity 6D costs $1.99, with no in-app purchases.

### Is (LispLab) free?

(LispLab) is free to download, with in-app purchases available.

### Which has better reviews, Gravity 6D or (LispLab)?

Gravity 6D and (LispLab) are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Gravity 6D or (LispLab) have ads?

Neither Gravity 6D nor (LispLab) shows ads.

### Which is updated more often, Gravity 6D or (LispLab)?

Gravity 6D ships an update every 16 months, and (LispLab) every 2 months. Most recently, Gravity 6D was updated on September 9, 2026 and (LispLab) 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.*