# Periodic Table Watch vs Periodic

The clearest difference is update cadence: Periodic at every 5 weeks against Periodic Table Watch's every 9 months. Periodic also leads on iOS requirement (15.1 vs 26.0). Periodic Table Watch's advantage is price ($0.99 vs $1.99). On ads, in-app purchases and device support there is nothing between them.

Periodic Table Watch costs $0.99 and Periodic $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Periodic Table Watch ships an update every 9 months, Periodic every 5 weeks. The most recent releases landed on August 31, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Periodic Table Watch | Periodic |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Size | 6 MB | 31 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jim Haungs](https://appshunter.io/developer/1498282259) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Periodic Table Watch

[App page](https://appshunter.io/ios/app/periodic-table-watch/id1551884849)

**Features:** Apple Watch app

**In-app purchases:** none


### Periodic

[App page](https://appshunter.io/ios/app/periodic-table-elements-pro/id1628646759)

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

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Table Watch free?

Periodic Table Watch costs $0.99, with no in-app purchases.

### Is Periodic free?

Periodic costs $1.99, with no in-app purchases.

### Do Periodic Table Watch or Periodic have ads?

Neither Periodic Table Watch nor Periodic shows ads.

### Which is updated more often, Periodic Table Watch or Periodic?

Periodic Table Watch ships an update every 9 months, and Periodic every 5 weeks. Most recently, Periodic Table Watch was updated on August 31, 2026 and Periodic on August 16, 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.*