# USDA PPRL vs Blending Stack

The clearest difference is price: USDA PPRL at Free against Blending Stack's $3.99. USDA PPRL also leads on update cadence (every 2 months vs every 14 months) and ratings volume (4 vs 1). Blending Stack's advantage is rating (5.0 vs 4.8) and chart position (#199 vs unranked). On review sentiment, ads, in-app purchases and device support there is nothing between them.

USDA PPRL is free to download; Blending Stack costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Blending Stack holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

USDA PPRL ships an update every 2 months, Blending Stack every 14 months. The most recent releases landed on September 14, 2026 and July 28, 2026 respectively.

## The numbers

| Metric | USDA PPRL | Blending Stack |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/usda-pprl/id6444455958/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blending-stack/id6736709814/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#199** |
| Size | 42 MB | 3 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Utah State University](https://appshunter.io/developer/408732147) | [Kids n Books LLC](https://appshunter.io/developer/1773130843) |

## What reviewers say

### USDA PPRL

[App page](https://appshunter.io/ios/app/usda-pprl/id6444455958)

This app helps livestock owners identify poisonous plants to prevent animal loss. It provides a searchable database of toxic flora and allows users to report livestock poisonings to the research lab.

**Highlights:** Identify poisonous plants, Searchable plant database, Prevent livestock loss, Report livestock poisonings, Awareness of toxic flora

**Features:** macOS Compatibility

**In-app purchases:** none


### Blending Stack

[App page](https://appshunter.io/ios/app/blending-stack/id6736709814)

**Currently charting:** #199 Top Paid · Education (US App Store)

This app helps educators and parents support students with learning differences, like dyslexia, by creating customizable blending stacks. It aids in building decoding skills step-by-step through a structured phoneme progression, suitable for one-on-one or small group instruction.

**Highlights:** Customizable blending stacks, Supports CVC to multisyllabic words, Structured phoneme progression, Step-by-step decoding skill building, Ideal for one-on-one instruction, Suitable for small group lessons

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is USDA PPRL free?

USDA PPRL is free to download, with no in-app purchases.

### Is Blending Stack free?

Blending Stack costs $3.99, with no in-app purchases.

### Which has better reviews, USDA PPRL or Blending Stack?

Blending Stack is rated higher. USDA PPRL averages 4.8 out of 5 from 4 ratings, while Blending Stack averages 5.0 from 1 ratings.

### Do USDA PPRL or Blending Stack have ads?

Neither USDA PPRL nor Blending Stack shows ads.

### Which is updated more often, USDA PPRL or Blending Stack?

USDA PPRL ships an update every 2 months, and Blending Stack every 14 months. Most recently, USDA PPRL was updated on September 14, 2026 and Blending Stack on July 28, 2026.

---

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