# Periodic vs Salam Edu

The clearest difference is ads: Salam Edu at none against Periodic's shown. Salam Edu also leads on iOS requirement (13.0 vs 15.1). Periodic's advantage is update cadence (every 5 weeks vs every 10 months). 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.

Periodic ships an update every 5 weeks, Salam Edu every 10 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Periodic | Salam Edu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 10 months |
| Size | 35 MB | 254 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) | [Mohamed Ahmed Radwan](https://appshunter.io/developer/1586606710) |

## What reviewers say

### Periodic

[App page](https://appshunter.io/ios/app/periodic-table-elements/id1628647298)

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

**In-app purchases:** none


### Salam Edu

[App page](https://appshunter.io/ios/app/salam-edu/id6590618727)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Periodic free?

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

### Is Salam Edu free?

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

### Do Periodic or Salam Edu have ads?

Periodic shows ads; Salam Edu does not.

### Which is updated more often, Periodic or Salam Edu?

Periodic ships an update every 5 weeks, and Salam Edu every 10 months. Most recently, Periodic was updated on October 12, 2026 and Salam Edu on October 5, 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.*