# Periodic Table vs PrepAce

The clearest difference is in-app purchases: PrepAce at none against Periodic Table's 3. PrepAce also leads on iOS requirement (15.0 vs 18.0). Periodic Table's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Periodic Table sells 3 in-app purchases, starting at $0.99 per month. PrepAce asks for nothing beyond the download.

Periodic Table ships an update every 5 days, PrepAce every 2 months. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Periodic Table | PrepAce |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/periodic-table-chemistry-3d/id1539244235/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 50 MB | 100 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [吉帅 仇](https://appshunter.io/developer/1087837335) | [Jhon Jaime Tincusi Ccorimanya](https://appshunter.io/developer/1853388447) |

## What reviewers say

### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-chemistry-3d/id1539244235)

Explore the periodic table with detailed element information and visualize molecules in 2D and 3D. This app offers numerous chemistry tools for calculations and analysis, designed for students and educators.

**Highlights:** Interactive 118-element periodic table, 2D and 3D molecule visualization, Equation balancer, 29 chemistry calculation tools, Offline molecule database, Multi-language support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Pro Monthly | $0.99 | per month |
| Chemistry Pro Yearly | $2.99 | per year |
| Chemistry Pro Lifetime | $5.99 | one-time |


### PrepAce

[App page](https://appshunter.io/ios/app/prepace-study-for-sat-prep/id6793244730)

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

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Table free?

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

### Is PrepAce free?

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

### Do Periodic Table or PrepAce have ads?

Neither Periodic Table nor PrepAce shows ads.

### Which is updated more often, Periodic Table or PrepAce?

Periodic Table ships an update every 5 days, and PrepAce every 2 months. Most recently, Periodic Table was updated on October 30, 2026 and PrepAce on October 29, 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.*