# ROOM vs Periodic Table Memorization

The clearest difference is in-app purchases: ROOM at none against Periodic Table Memorization's 3. ROOM also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). Periodic Table Memorization's advantage is update cadence (every 3 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Periodic Table Memorization sells 3 in-app purchases, starting at $1.99 per month. ROOM asks for nothing beyond the download.

ROOM ships an update every 6 months, Periodic Table Memorization every 3 weeks. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ROOM | Periodic Table Memorization |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (3 ratings)](https://appshunter.io/ios/app/periodic-table-memorization/id6776222961/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 18 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lemon Systems GmbH](https://appshunter.io/developer/1248314736) | [YU KORIKI](https://appshunter.io/developer/6776222963) |

## What reviewers say

### ROOM

[App page](https://appshunter.io/ios/app/room-e-for-iphone/id1482375543)

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

**In-app purchases:** none


### Periodic Table Memorization

[App page](https://appshunter.io/ios/app/periodic-table-memorization/id6776222961)

Master element symbols and atomic numbers with interactive study modes. Build habits with daily streaks and reminders, track progress with charts, and prepare for chemistry exams. Works offline and offers a free trial.

**Highlights:** Four study modes: flashcards, quiz, fill-in-the-blank, puzzle, Daily streaks and reminders, Progress tracking charts, Offline functionality, Exam preparation for chemistry, Memorize element symbols and atomic numbers

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Premium Yearly | $22.99 | per year |
| Premium lifetime | $1.99 | one-time |


## Frequently asked questions

### Is ROOM free?

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

### Is Periodic Table Memorization free?

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

### Do ROOM or Periodic Table Memorization have ads?

Periodic Table Memorization shows ads; ROOM does not.

### Which is updated more often, ROOM or Periodic Table Memorization?

ROOM ships an update every 6 months, and Periodic Table Memorization every 3 weeks. Most recently, ROOM was updated on October 11, 2026 and Periodic Table Memorization on October 25, 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.*