# Deep Research+ vs Persimmon

The clearest difference is in-app purchases: Persimmon at none against Deep Research+'s 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Deep Research+ sells 2 in-app purchases, starting at $7.99 per month. Persimmon asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 27, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Deep Research+ | 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 15 MB | 23 MB |
| Requires iOS | 18.2 | **18.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Ivan Khaustov](https://appshunter.io/developer/1691888326) | [Momenta Lab LLC](https://appshunter.io/developer/1615879512) |

## What reviewers say

### Deep Research+

[App page](https://appshunter.io/ios/app/deep-research-plus/id6742564227)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free week trial subscription | $7.99 | per month |
| Free month trial subscription | $49.99 | per year |


### 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 Deep Research+ free?

Deep Research+ is free to download, with in-app purchases available.

### Is Persimmon free?

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

### Do Deep Research+ or Persimmon have ads?

Neither Deep Research+ nor Persimmon shows ads.

### Which is updated more often, Deep Research+ or Persimmon?

Deep Research+ ships an update every 3 weeks, and Persimmon every 3 weeks. Most recently, Deep Research+ was updated on September 27, 2026 and Persimmon on June 11, 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.*