# Substrate Entity vs Tower Grid

The clearest difference is iOS requirement: Tower Grid at 16.0 against Substrate Entity's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Substrate Entity ships an update every 5 days, Tower Grid every 4 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Substrate Entity | Tower Grid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tower-grid/id6758411374/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | — | Free |
| Size | 12 MB | 4 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [DRO1D LABS LIMITED](https://appshunter.io/developer/1803083780) | [Zachi Attia](https://appshunter.io/developer/1872794856) |

## What reviewers say

### Substrate Entity

[App page](https://appshunter.io/ios/app/substrate-entity/id6757655237)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tower Grid

[App page](https://appshunter.io/ios/app/tower-grid/id6758411374)

A minimalist logic puzzle game that tests your planning, pattern recognition, and spatial reasoning skills. Place towers on a grid to satisfy simple rules, with no timers or guessing required. Enjoy handcrafted puzzles with unique solutions that offer a fair and satisfying challenge.

**Highlights:** Minimalist logic puzzles, Tests planning and spatial reasoning, No timers or guessing, Handcrafted puzzles with unique solutions, Gradually increasing difficulty, Clean, distraction-free design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Substrate Entity free?

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

### Is Tower Grid free?

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

### Do Substrate Entity or Tower Grid have ads?

Neither Substrate Entity nor Tower Grid shows ads.

### Which is updated more often, Substrate Entity or Tower Grid?

Substrate Entity ships an update every 5 days, and Tower Grid every 4 days. Most recently, Substrate Entity was updated on October 20, 2026 and Tower Grid on October 25, 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.*