# (Open Source) Periodic Table vs Introductory Biology Tutor

The clearest difference is in-app purchases: (Open Source) Periodic Table at none against Introductory Biology Tutor's 1. Introductory Biology Tutor's advantage is update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Introductory Biology Tutor sells 1 one-off in-app purchase. (Open Source) Periodic Table asks for nothing beyond the download.

(Open Source) Periodic Table ships an update fortnightly, Introductory Biology Tutor weekly. The most recent releases landed on November 5, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | (Open Source) Periodic Table | Introductory Biology Tutor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 47 MB | 9 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AHMET EMRE DEDELER](https://appshunter.io/developer/1870913629) | [David Soulsby](https://appshunter.io/developer/1776367161) |

## What reviewers say

### (Open Source) Periodic Table

[App page](https://appshunter.io/ios/app/open-source-periodic-table/id6781818611)

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

**In-app purchases:** none


### Introductory Biology Tutor

[App page](https://appshunter.io/ios/app/introductory-biology-tutor/id6814193597)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Introductory Biology Tutor Access | $4.99 | one-time |


## Frequently asked questions

### Is (Open Source) Periodic Table free?

(Open Source) Periodic Table is free to download, with no in-app purchases.

### Is Introductory Biology Tutor free?

Introductory Biology Tutor is free to download, with in-app purchases available.

### Do (Open Source) Periodic Table or Introductory Biology Tutor have ads?

Neither (Open Source) Periodic Table nor Introductory Biology Tutor shows ads.

### Which is updated more often, (Open Source) Periodic Table or Introductory Biology Tutor?

(Open Source) Periodic Table ships an update fortnightly, and Introductory Biology Tutor weekly. Most recently, (Open Source) Periodic Table was updated on November 5, 2026 and Introductory Biology Tutor on October 26, 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.*