# Useful Periodic Table Lite vs Element OTG

The clearest difference is ads: Useful Periodic Table Lite at none against Element OTG's shown. Element OTG's advantage is update cadence (monthly vs every 25 months) and iOS requirement (13.0 vs 16.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Useful Periodic Table Lite ships an update every 25 months, Element OTG monthly. The most recent releases landed on October 2, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Useful Periodic Table Lite | Element OTG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/useful-periodic-table-lite/id584638498/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Monthly** |
| Monetization | Free | — |
| Size | 25 MB | 25 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mind Trends LLC](https://appshunter.io/developer/582509215) | [Japality Limited](https://appshunter.io/developer/1574046707) |

## What reviewers say

### Useful Periodic Table Lite

[App page](https://appshunter.io/ios/app/useful-periodic-table-lite/id584638498)

Access a comprehensive periodic table with all elements and their properties. Includes a unit converter, Wikipedia links for detailed information, and a quiz to test your knowledge. Ideal for students and professionals in science and engineering.

**Highlights:** Complete periodic table of elements, Detailed element properties, Integrated unit converter, Links to Wikipedia for further research, Elements quiz for students

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

**In-app purchases:** none


### Element OTG

[App page](https://appshunter.io/ios/app/element-otg/id6749494404)

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

**In-app purchases:** none


## Frequently asked questions

### Is Useful Periodic Table Lite free?

Useful Periodic Table Lite is free to download, with no in-app purchases.

### Is Element OTG free?

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

### Do Useful Periodic Table Lite or Element OTG have ads?

Element OTG shows ads; Useful Periodic Table Lite does not.

### Which is updated more often, Useful Periodic Table Lite or Element OTG?

Useful Periodic Table Lite ships an update every 25 months, and Element OTG monthly. Most recently, Useful Periodic Table Lite was updated on October 2, 2026 and Element OTG on October 20, 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.*