# Impari Period vs Periodic

The clearest difference is update cadence: Impari Period at fortnightly against Periodic's every 5 weeks. Periodic's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Impari Period ships an update fortnightly, Periodic every 5 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Impari Period | Periodic |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Size | 3 MB | 31 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [David Orgeman](https://appshunter.io/developer/1545166417) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Impari Period

[App page](https://appshunter.io/ios/app/impari-period/id1555959470)

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

**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 Impari Period free?

Impari Period costs $1.99, with no in-app purchases.

### Is Periodic free?

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

### Do Impari Period or Periodic have ads?

Neither Impari Period nor Periodic shows ads.

### Which is updated more often, Impari Period or Periodic?

Impari Period ships an update fortnightly, and Periodic every 5 weeks. Most recently, Impari Period was updated on November 3, 2026 and Periodic on November 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.*