# Synapse Social vs MedDiffDx

The clearest difference is in-app purchases: Synapse Social at none against MedDiffDx's 1. Synapse Social also leads on update cadence (every 2 days vs every 6 days). MedDiffDx's advantage is iOS requirement (16 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. MedDiffDx sells 1 one-off in-app purchase. Synapse Social asks for nothing beyond the download.

Synapse Social ships an update every 2 days, MedDiffDx every 6 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Synapse Social | MedDiffDx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (15 ratings)](https://appshunter.io/ios/app/synapse-social/id6747992429/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 days |
| Monetization | Free | — |
| Size | 75 MB | 7 MB |
| Requires iOS | 18.0 | **16** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Synapse Social LLC](https://appshunter.io/developer/1769426157) | [worawit tantaopas](https://appshunter.io/developer/1833368157) |

## What reviewers say

### Synapse Social

[App page](https://appshunter.io/ios/app/synapse-social/id6747992429)

This app delivers a personalized feed of new research papers, helping scientists stay updated without constant searching. It learns your interests to monitor journals, authors, and institutions, providing relevant discoveries in one organized place.

**Highlights:** Personalized research feeds, Track research questions, not just keywords, Follow alerts for journals, authors, and institutions, View paper summaries and methodologies, Track papers gaining online attention, Save and organize research

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

**In-app purchases:** none


### MedDiffDx

[App page](https://appshunter.io/ios/app/meddiffdx-internal-medicine/id6751080004)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Topics | $3.99 | one-time |


## Frequently asked questions

### Is Synapse Social free?

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

### Is MedDiffDx free?

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

### Do Synapse Social or MedDiffDx have ads?

Neither Synapse Social nor MedDiffDx shows ads.

### Which is updated more often, Synapse Social or MedDiffDx?

Synapse Social ships an update every 2 days, and MedDiffDx every 6 days. Most recently, Synapse Social was updated on November 5, 2026 and MedDiffDx on November 5, 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.*