# Eco Environment vs Persimmon

The clearest difference is update cadence: Eco Environment at every 4 days against Persimmon's every 3 weeks. Eco Environment also leads on iOS requirement (13.4 vs 18.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Eco Environment ships an update every 4 days, Persimmon every 3 weeks. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Eco Environment | Persimmon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/persimmon-research-simplified/id6747952930/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 22 MB | 23 MB |
| Requires iOS | **13.4** | 18.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Sudhakar Reddy Yalla](https://appshunter.io/developer/1742307292) | [Momenta Lab LLC](https://appshunter.io/developer/1615879512) |

## What reviewers say

### Eco Environment

[App page](https://appshunter.io/ios/app/eco-environment/id6733238323)

**Features:** macOS Compatibility

**In-app purchases:** none


### Persimmon

[App page](https://appshunter.io/ios/app/persimmon-research-simplified/id6747952930)

This app simplifies complex scientific research papers from arXiv and SocArXiv using AI. It offers customizable summaries tailored to your expertise level and allows you to search, save, and get daily updates on new publications. You can also use it as a basic preprint browser without AI.

**Highlights:** AI-powered paper summaries, Customizable AI models and expertise levels, Search arXiv and SocArXiv, Save papers for offline access, Daily updates and notifications, Privacy-focused, no data collection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Eco Environment free?

Eco Environment is free to download, with no in-app purchases.

### Is Persimmon free?

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

### Do Eco Environment or Persimmon have ads?

Neither Eco Environment nor Persimmon shows ads.

### Which is updated more often, Eco Environment or Persimmon?

Eco Environment ships an update every 4 days, and Persimmon every 3 weeks. Most recently, Eco Environment was updated on October 19, 2026 and Persimmon on October 15, 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.*