# Smart cylinder vs The GrassGuide

The clearest difference is in-app purchases: Smart cylinder at none against The GrassGuide's 2. Smart cylinder also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.4 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. The GrassGuide sells 2 in-app purchases, starting at $4.99 per month. Smart cylinder asks for nothing beyond the download.

Smart cylinder ships an update every 3 weeks, The GrassGuide every 2 months. The most recent releases landed on May 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Smart cylinder | The GrassGuide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 162 MB | 58 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AGA AS](https://appshunter.io/developer/532525813) | [Mathias Vabo](https://appshunter.io/developer/1544322158) |

## What reviewers say

### Smart cylinder

[App page](https://appshunter.io/ios/app/smart-cylinder/id6444184049)

**In-app purchases:** none


### The GrassGuide

[App page](https://appshunter.io/ios/app/the-grassguide/id6744040837)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| Premium Årlig | $49.99 | per year |


## Frequently asked questions

### Is Smart cylinder free?

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

### Is The GrassGuide free?

The GrassGuide is free to download, with in-app purchases available.

### Do Smart cylinder or The GrassGuide have ads?

Neither Smart cylinder nor The GrassGuide shows ads.

### Which is updated more often, Smart cylinder or The GrassGuide?

Smart cylinder ships an update every 3 weeks, and The GrassGuide every 2 months. Most recently, Smart cylinder was updated on May 16, 2026 and The GrassGuide on September 13, 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.*