# Periodic Table Memorization vs StatRedPen

The clearest difference is update cadence: StatRedPen at every 2 days against Periodic Table Memorization's every 3 weeks. On price, ads, in-app purchases 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 and StatRedPen sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Periodic Table Memorization ships an update every 3 weeks, StatRedPen every 2 days. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Periodic Table Memorization | StatRedPen |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YU KORIKI](https://appshunter.io/developer/6776222963) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### 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 |


### StatRedPen

[App page](https://appshunter.io/ios/app/statredpen-stats-exam-grader/id6794589846)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 완전판 해금 | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Periodic Table Memorization free?

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

### Is StatRedPen free?

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

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

Both Periodic Table Memorization and StatRedPen show ads.

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

Periodic Table Memorization ships an update every 3 weeks, and StatRedPen every 2 days. Most recently, Periodic Table Memorization was updated on October 25, 2026 and StatRedPen on October 21, 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.*