# Tap OChem vs Unreal Chemist

The clearest difference is price: Unreal Chemist at Free against Tap OChem's $4.99. Unreal Chemist also leads on update cadence (every 2 weeks vs every 3 months) and iOS requirement (11.0 vs 13.2). Tap OChem's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume and device support there is nothing between them.

Unreal Chemist is free to download; Tap OChem costs $4.99 up front. Unreal Chemist sells 1 one-off in-app purchase. Tap OChem asks for nothing beyond the download.

Tap OChem holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 39 and 68 respectively. Written reviews point the same way: 92% of Tap OChem's written reviews are positive against 73% of Unreal Chemist's.

Tap OChem ships an update every 3 months, Unreal Chemist every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Tap OChem | Unreal Chemist |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.7 (39 ratings)](https://appshunter.io/ios/app/tap-ochem/id579861146/reviews)** | [4.5 (68 ratings)](https://appshunter.io/ios/app/unreal-chemist/id1597689215/reviews) |
| Number of ratings | 39 | **68** |
| Positive reviews | **91.7% of reviews** | 73.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3.5 GB | 342 MB |
| Requires iOS | 13.2 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tap OChem, LLC](https://appshunter.io/developer/579861209) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## 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


### Unreal Chemist

[App page](https://appshunter.io/ios/app/unreal-chemist/id1597689215)

Explore a virtual chemistry lab on your phone. Mix chemicals, observe reactions, and conduct over 750 unique simulations with more than 150 available substances. Adjust variables like temperature and concentration to understand chemical principles.

**Highlights:** Mix chemicals for reactions, Burn salts for colorful flames, Heat elements for color emission, Adjust reactant concentration and quantity, Regulate reaction temperature, Control time flow (slow/fast forward), Monitor pH changes with indicators

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $5.99 | one-time |

**What reviewers like**

- ✨ Very educational for chemistry students
- 👍 Realistic looking and lots to do
- 🌟 Contains a heap of information
- 👍 Ads are occasional and not deterring
- 🚀 Amazing graphics and advanced features

**What reviewers complain about**

- 🐛 Some reactions are inaccurate
- 🐛 Buggy interface and features
- 💸 Many features behind a paywall
- 😩 Ads can be excessive
- 🤔 Free version is uninspiring

**Reported bugs**

- Sulfuric acid not dissolving with salts
- Heating solution during titration
- Watch ad for premium session not working
- Mixing game not always working intuitively
- Buttons on iPhone blocked by camera

**Requested features**

- Add more elements (e.g., Mn, H, O, Cl, F, Pb)
- Add more acids (e.g., Chloroauric acid, Vanadic acid, Perrhenic acid)
- Add more bases and solvents (e.g., styrofoam, polystyrene, ethanol, acetone)
- Add gases (e.g., Chlorine, Fluorine, Hydrogen, Oxygen)
- Option to specify amounts of chemicals to add


## Frequently asked questions

### Is Tap OChem free?

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

### Is Unreal Chemist free?

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

### Which has better reviews, Tap OChem or Unreal Chemist?

Tap OChem is rated higher. Tap OChem averages 4.7 out of 5 from 39 ratings, while Unreal Chemist averages 4.5 from 68 ratings.

### Do Tap OChem or Unreal Chemist have ads?

Unreal Chemist shows ads; Tap OChem does not.

### Which is updated more often, Tap OChem or Unreal Chemist?

Tap OChem ships an update every 3 months, and Unreal Chemist every 2 weeks. Most recently, Tap OChem was updated on November 1, 2026 and Unreal Chemist on November 3, 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.*