# CryptoDuck vs Scale Ruler

The clearest difference is update cadence: Scale Ruler at every 2 weeks against CryptoDuck's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CryptoDuck sells 6 in-app purchases, starting at $0.99 per month and Scale Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CryptoDuck ships an update every 3 months, Scale Ruler every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CryptoDuck | Scale Ruler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 11 MB | 11 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Baitemi Technology Co., Ltd](https://appshunter.io/developer/1789135443) | [佳 赵](https://appshunter.io/developer/6802149278) |

## What reviewers say

### CryptoDuck

[App page](https://appshunter.io/ios/app/cryptoduck-secret-chat/id6740244562)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $7.99 | per year |
| Couple Pack | $0.99 | one-time |
| Emoji Pack | $0.99 | one-time |
| Festival Pack | $0.99 | one-time |
| Pro Lifetime | $14.99 | one-time |


### Scale Ruler

[App page](https://appshunter.io/ios/app/scale-ruler-pocket-ruler/id6802178983)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scale Ruler Pro | $1.99 | one-time |


## Frequently asked questions

### Is CryptoDuck free?

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

### Is Scale Ruler free?

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

### Do CryptoDuck or Scale Ruler have ads?

Neither CryptoDuck nor Scale Ruler shows ads.

### Which is updated more often, CryptoDuck or Scale Ruler?

CryptoDuck ships an update every 3 months, and Scale Ruler every 2 weeks. Most recently, CryptoDuck was updated on October 28, 2026 and Scale Ruler on October 31, 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.*