# Tap OChem vs ProteinViewerApp

The clearest difference is review sentiment: Tap OChem at 92% against ProteinViewerApp's 0%. Tap OChem also leads on rating (4.7 vs 3.0) and ratings volume (39 vs 2). ProteinViewerApp's advantage is update cadence (fortnightly vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Tap OChem costs $4.99 and ProteinViewerApp $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tap OChem holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Tap OChem has 39 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 92% of Tap OChem's written reviews are positive against 0% of ProteinViewerApp's.

Tap OChem ships an update every 3 months, ProteinViewerApp fortnightly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Tap OChem | ProteinViewerApp |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[4.7 (39 ratings)](https://appshunter.io/ios/app/tap-ochem/id579861146/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/proteinviewerapp/id6752284307/reviews) |
| Number of ratings | **39** | 2 |
| Positive reviews | **91.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 3.5 GB | 8 MB |
| Requires iOS | **13.2** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Tap OChem, LLC](https://appshunter.io/developer/579861209) | [JONG HYUN LEE](https://appshunter.io/developer/1739037759) |

## What reviewers say

### Tap OChem

[App page](https://appshunter.io/ios/app/tap-ochem/id579861146)

Visualize complex organic chemistry reactions and concepts with animated explanations. This app covers a wide range of undergraduate organic chemistry topics, aiding in exam preparation and understanding of molecular behavior.

**Highlights:** Animated organic chemistry reactions, Detailed concept explanations, Electron pushing diagrams, Full-color text descriptions, MCAT, PCAT, OAT, DAT prep, Regular content updates

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

**In-app purchases:** none


### ProteinViewerApp

[App page](https://appshunter.io/ios/app/proteinviewerapp/id6752284307)

Explore and learn about protein structures in 3D. This tool offers interactive visualization, educational modes, and direct access to protein data for students and researchers.

**Highlights:** 3D protein visualization, Step-by-step structural insights, Educational modes by category, Multiple rendering styles, Direct PDB integration, Clear terminology explanations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tap OChem free?

Tap OChem costs $4.99, with no in-app purchases.

### Is ProteinViewerApp free?

ProteinViewerApp costs $4.99, with no in-app purchases.

### Which has better reviews, Tap OChem or ProteinViewerApp?

Tap OChem is rated higher. Tap OChem averages 4.7 out of 5 from 39 ratings, while ProteinViewerApp averages 3.0 from 2 ratings.

### Do Tap OChem or ProteinViewerApp have ads?

Neither Tap OChem nor ProteinViewerApp shows ads.

### Which is updated more often, Tap OChem or ProteinViewerApp?

Tap OChem ships an update every 3 months, and ProteinViewerApp fortnightly. Most recently, Tap OChem was updated on November 1, 2026 and ProteinViewerApp 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.*