# ColdLog vs Zero

The clearest difference is ads: ColdLog at none against Zero's shown. ColdLog also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. ColdLog sells 1 in-app purchase, starting at $8.99 per year and Zero sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ColdLog ships an update weekly, Zero every 5 days. The most recent releases landed on September 27, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ColdLog | Zero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 5 days** |
| Size | 17 MB | 25 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [JRSW s.r.o.](https://appshunter.io/developer/1856840734) | [WWW.UNICOSE.COM](https://appshunter.io/developer/367322767) |

## What reviewers say

### ColdLog

[App page](https://appshunter.io/ios/app/coldlog/id6755875822)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ColdLog PRO | $8.99 | per year |


### Zero

[App page](https://appshunter.io/ios/app/zero-cold-plunge/id6758989393)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zero PRO Monthly | $9.99 | per month |
| Zero PRO Yearly | $69.99 | per year |


## Frequently asked questions

### Is ColdLog free?

ColdLog is free to download, with in-app purchases available.

### Is Zero free?

Zero is free to download, with in-app purchases available.

### Do ColdLog or Zero have ads?

Zero shows ads; ColdLog does not.

### Which is updated more often, ColdLog or Zero?

ColdLog ships an update weekly, and Zero every 5 days. Most recently, ColdLog was updated on September 27, 2026 and Zero on September 17, 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.*