# UniSpeed Calc vs Periscope

The clearest difference is ads: Periscope at none against UniSpeed Calc's shown. Periscope also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.6). UniSpeed Calc's advantage is update cadence (every 3 days vs every 4 weeks). On price and in-app purchases there is nothing between them.

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

UniSpeed Calc ships an update every 3 days, Periscope every 4 weeks. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | UniSpeed Calc | Periscope |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 4 weeks |
| Size | 38 MB | 47 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Camuning Technology Co., LTD](https://appshunter.io/developer/1619598364) | [MEMBSCRIBE TECHNOLOGY LIMITED](https://appshunter.io/developer/1693264902) |

## What reviewers say

### UniSpeed Calc

[App page](https://appshunter.io/ios/app/unispeed-calc/id6498953177)

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

**In-app purchases:** none


### Periscope

[App page](https://appshunter.io/ios/app/periscope/id6760177107)

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

**In-app purchases:** none


## Frequently asked questions

### Is UniSpeed Calc free?

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

### Is Periscope free?

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

### Do UniSpeed Calc or Periscope have ads?

UniSpeed Calc shows ads; Periscope does not.

### Which is updated more often, UniSpeed Calc or Periscope?

UniSpeed Calc ships an update every 3 days, and Periscope every 4 weeks. Most recently, UniSpeed Calc was updated on October 11, 2026 and Periscope on October 7, 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.*