# Hidden calc vs Smart Calc+

The clearest difference is ads: Smart Calc+ at none against Hidden calc's shown. Smart Calc+ also leads on update cadence (every 3 days vs every 2 weeks) and iOS requirement (13.4 vs 15.8.3). On price, in-app purchases and device support there is nothing between them.

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

Hidden calc ships an update every 2 weeks, Smart Calc+ every 3 days. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Hidden calc | Smart Calc+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 35 MB | 22 MB |
| Requires iOS | 15.8.3 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Rahman Usta](https://appshunter.io/developer/1750311538) |

## What reviewers say

### Hidden calc

[App page](https://appshunter.io/ios/app/hidden-calc/id6502871727)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Calc+

[App page](https://appshunter.io/ios/app/smart-calc-plus/id6504203262)

**In-app purchases:** none


## Frequently asked questions

### Is Hidden calc free?

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

### Is Smart Calc+ free?

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

### Do Hidden calc or Smart Calc+ have ads?

Hidden calc shows ads; Smart Calc+ does not.

### Which is updated more often, Hidden calc or Smart Calc+?

Hidden calc ships an update every 2 weeks, and Smart Calc+ every 3 days. Most recently, Hidden calc was updated on October 10, 2026 and Smart Calc+ on October 15, 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.*