# EngToolBox vs Periodic table

The clearest difference is in-app purchases: EngToolBox at none against Periodic table's 3. Periodic table's advantage is update cadence (every 2 months vs every 27 months) and iOS requirement (15.1 vs 17.2). 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 $4.49 per 7 days. EngToolBox asks for nothing beyond the download.

EngToolBox ships an update every 27 months, Periodic table every 2 months. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | EngToolBox | Periodic table |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Size | 3 MB | 34 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Irfan Uruci](https://appshunter.io/developer/1761565214) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### EngToolBox

[App page](https://appshunter.io/ios/app/engtoolbox/id6615082500)

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

**In-app purchases:** none


### Periodic table

[App page](https://appshunter.io/ios/app/periodic-table-chem/id6757834353)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.49 | per 7 days |
| Yearly | $34.99 | per year |
| Lifetime Access | $64.99 | one-time |


## Frequently asked questions

### Is EngToolBox free?

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

### Is Periodic table free?

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

### Do EngToolBox or Periodic table have ads?

Neither EngToolBox nor Periodic table shows ads.

### Which is updated more often, EngToolBox or Periodic table?

EngToolBox ships an update every 27 months, and Periodic table every 2 months. Most recently, EngToolBox was updated on October 25, 2026 and Periodic table on October 11, 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.*