# FabCalc vs SM Offset

The clearest difference is in-app purchases: SM Offset at none against FabCalc's 4. FabCalc's advantage is ads (none vs shown) and update cadence (weekly vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. FabCalc sells 4 in-app purchases, starting at $4.99 per month. SM Offset asks for nothing beyond the download.

FabCalc ships an update weekly, SM Offset fortnightly. The most recent releases landed on September 4, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | FabCalc | SM Offset |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Fortnightly |
| Size | 3 MB | 7 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Double Vision USA LLC](https://appshunter.io/developer/1894678139) | [Bradley Evans](https://appshunter.io/developer/6781870098) |

## What reviewers say

### FabCalc

[App page](https://appshunter.io/ios/app/fabcalc-flat-pattern-dxf/id6781708798)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FabCalc Pro Monthly | $4.99 | per month |
| FabCalc Pro Yearly | $29.99 | per year |
| Fab Shop Bundle | $119.99 | one-time |
| ShopCalc Pro Lifetime | $129.99 | one-time |


### SM Offset

[App page](https://appshunter.io/ios/app/sm-offset/id6781870096)

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

**In-app purchases:** none


## Frequently asked questions

### Is FabCalc free?

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

### Is SM Offset free?

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

### Do FabCalc or SM Offset have ads?

SM Offset shows ads; FabCalc does not.

### Which is updated more often, FabCalc or SM Offset?

FabCalc ships an update weekly, and SM Offset fortnightly. Most recently, FabCalc was updated on September 4, 2026 and SM Offset on September 18, 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.*