# Calculator· vs Fortified ID

The clearest difference is in-app purchases: Fortified ID at none against Calculator·'s 3. Fortified ID also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Calculator· sells 3 in-app purchases, starting at $0.99 per month. Fortified ID asks for nothing beyond the download.

Calculator· ships an update every 3 months, Fortified ID monthly. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calculator· | Fortified ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (34K ratings)](https://appshunter.io/ios/app/calculator/id554836784/reviews)** | — |
| Number of ratings | **34K** | — |
| Positive reviews | 84.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 11 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tim O's Studios, LLC](https://appshunter.io/developer/412839685) | [Fortifiedid AB](https://appshunter.io/developer/1653653734) |

## What reviewers say

### Calculator·

[App page](https://appshunter.io/ios/app/calculator/id554836784)

This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.

**Highlights:** Basic arithmetic operations, Percentage calculations, Multiple color schemes, Copy results, Square, square root, inverse functions, iPad Split View support, Apple Watch support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade App | $0.99 | per month |
| Upgrade App | $4.99 | per year |
| Upgrade App | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Quick and responsive
- 💡 Percentage function works well
- 👍 Large, clear buttons
- 👍 Straightforward, no-frills design

**What reviewers complain about**

- 🔋 Frequent ads can be distracting
- 🐛 Occasional crashes or freezes
- 🔒 Lack of customization options
- 💡 No backspace/undo function
- 💡 Missing advanced features like memory

**Reported bugs**

- Crashes when performing long calculations
- Freezes when opening the app
- Incorrect results for some complex calculations

**Requested features**

- Add a backspace/undo button
- Implement a history/memory feature
- Provide more customization options
- Reduce frequency of ads


### Fortified ID

[App page](https://appshunter.io/ios/app/fortified-id/id6483760600)

**In-app purchases:** none


## Frequently asked questions

### Is Calculator· free?

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

### Is Fortified ID free?

Fortified ID is free to download, with no in-app purchases.

### Do Calculator· or Fortified ID have ads?

Calculator· shows ads; Fortified ID does not.

### Which is updated more often, Calculator· or Fortified ID?

Calculator· ships an update every 3 months, and Fortified ID monthly. Most recently, Calculator· was updated on November 1, 2026 and Fortified ID on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*