# CATS Input Method Pro vs Camera Scale for Grams AI Mass

The clearest difference is in-app purchases: CATS Input Method Pro at none against Camera Scale for Grams AI Mass's 2. Camera Scale for Grams AI Mass's advantage is update cadence (monthly vs every 24 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Camera Scale for Grams AI Mass sells 2 in-app purchases, starting at $4.99 per month. CATS Input Method Pro asks for nothing beyond the download.

CATS Input Method Pro ships an update every 24 months, Camera Scale for Grams AI Mass monthly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | CATS Input Method Pro | Camera Scale for Grams AI Mass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Monthly** |
| Size | 7 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YIU LEUNG RANDY CHAN](https://appshunter.io/developer/1474191447) | [Aneesh Pradeep](https://appshunter.io/developer/1836157821) |

## What reviewers say

### CATS Input Method Pro

[App page](https://appshunter.io/ios/app/cats-input-method-pro/id1523143711)

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

**In-app purchases:** none


### Camera Scale for Grams AI Mass

[App page](https://appshunter.io/ios/app/camera-scale-for-grams-ai-mass/id6781311492)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mass Pro — Monthly | $4.99 | per month |
| Mass Pro — Annual | $24.99 | per year |


## Frequently asked questions

### Is CATS Input Method Pro free?

CATS Input Method Pro is free to download, with no in-app purchases.

### Is Camera Scale for Grams AI Mass free?

Camera Scale for Grams AI Mass is free to download, with in-app purchases available.

### Do CATS Input Method Pro or Camera Scale for Grams AI Mass have ads?

Neither CATS Input Method Pro nor Camera Scale for Grams AI Mass shows ads.

### Which is updated more often, CATS Input Method Pro or Camera Scale for Grams AI Mass?

CATS Input Method Pro ships an update every 24 months, and Camera Scale for Grams AI Mass monthly. Most recently, CATS Input Method Pro was updated on October 29, 2026 and Camera Scale for Grams AI Mass on October 28, 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.*