# US Muscle vs Grass Identifier

The clearest difference is in-app purchases: US Muscle at none against Grass Identifier's 8. US Muscle also leads on iOS requirement (9.0 vs 13.0). Grass Identifier's advantage is update cadence (every 9 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Grass Identifier sells 8 in-app purchases, starting at $6.99 per 7 days. US Muscle asks for nothing beyond the download.

US Muscle ships an update every 5 months, Grass Identifier every 9 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | US Muscle | Grass Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (221 ratings)](https://appshunter.io/ios/app/grass-identifier-ai-scan/id6748553668/reviews)** |
| Number of ratings | — | **221** |
| Positive reviews | — | 26.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 186 MB | 70 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Total Web Systems Limited](https://appshunter.io/developer/826563624) | [Manuel Worlitzer](https://appshunter.io/developer/1785527240) |

## What reviewers say

### US Muscle

[App page](https://appshunter.io/ios/app/us-muscle/id1284019233)

**Features:** macOS Compatibility

**In-app purchases:** none


### Grass Identifier

[App page](https://appshunter.io/ios/app/grass-identifier-ai-scan/id6748553668)

Identify grass, weeds, and plants instantly with AI-powered photo recognition. Get detailed information and actionable tips for maintaining a healthy lawn and managing common yard issues. Ideal for homeowners and gardeners seeking to improve their outdoor spaces.

**Highlights:** Instant grass, weed, and plant identification, Detailed lawn care information, Guidance on managing lawn issues, AI-powered plant ID technology, Save and track lawn health

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grass Identifier Premium | $6.99 | per 7 days |
| Grass Identifier Premium | $12.99 | per month |
| Premium Yearly | $14.99 | per year |
| Grass Identifier Premium | $19.99 | per year |
| Grass Identifier Special Offer | $19.99 | per year |
| Grass Identifier Premium | $39.99 | per year |
| Grass Identifier Premium | $39.99 | per year |
| Grass Identifier Premium | $69.99 | one-time |


## Frequently asked questions

### Is US Muscle free?

US Muscle is free to download, with no in-app purchases.

### Is Grass Identifier free?

Grass Identifier is free to download, with in-app purchases available.

### Do US Muscle or Grass Identifier have ads?

Neither US Muscle nor Grass Identifier shows ads.

### Which is updated more often, US Muscle or Grass Identifier?

US Muscle ships an update every 5 months, and Grass Identifier every 9 days. Most recently, US Muscle was updated on November 3, 2026 and Grass Identifier on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*