# Calculator HD Pro vs CertFID

The clearest difference is price: CertFID at Free against Calculator HD Pro's $9.99. CertFID also leads on in-app purchases (none vs 2). On update cadence, ads, device support and iOS requirement there is nothing between them.

CertFID is free to download; Calculator HD Pro costs $9.99 up front. Calculator HD Pro sells 2 one-off in-app purchases. CertFID asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calculator HD Pro | CertFID |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (11K ratings)](https://appshunter.io/ios/app/calculator-hd-pro/id565023649/reviews)** | — |
| Number of ratings | **11K** | — |
| Positive reviews | 94.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 78 MB |
| Requires iOS | **15.2** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cider Software LLC](https://appshunter.io/developer/465180756) | [BTSE LLC](https://appshunter.io/developer/1569896194) |

## What reviewers say

### Calculator HD Pro

[App page](https://appshunter.io/ios/app/calculator-hd-pro/id565023649)

This app offers a powerful and customizable calculator experience with a dual-line display for seeing input and results simultaneously. Save and organize your calculations with history, labeling, and email options. Personalize layouts, themes, and fonts for a comfortable and efficient user experience.

**Highlights:** Dual-line display, Multi-line input, Calculation history, Customizable layouts and themes, Full scientific functions, Left-handed mode, VoiceOver accessibility

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Widget | $1.99 | one-time |
| Multiple History Tapes | $1.99 | one-time |

**What reviewers like**

- 🚀 Significantly better than Apple's calculator
- 👍 Excellent app with great features
- 👍 Flawless app, very useful
- 👍 Fantastic calculator, meets all needs
- 👍 Best calculator app, highly recommended

**What reviewers complain about**

- 🐛 Bothersome pop-up review requests
- 🐛 Cannot delete lists in history tapes
- 🐛 Repeated rate and review pop-ups

**Reported bugs**

- Cannot delete lists in history tapes
- Ads still appear after purchasing full version

**Requested features**

- Add binary, decimal, and hex conversion
- Ability to manually sort result lines
- Add a tax calculation button


### CertFID

[App page](https://appshunter.io/ios/app/certfid/id6748839234)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator HD Pro free?

Calculator HD Pro costs $9.99, and also offers in-app purchases.

### Is CertFID free?

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

### Do Calculator HD Pro or CertFID have ads?

Neither Calculator HD Pro nor CertFID shows ads.

### Which is updated more often, Calculator HD Pro or CertFID?

Calculator HD Pro ships an update every 2 months, and CertFID every 2 months. Most recently, Calculator HD Pro was updated on November 1, 2026 and CertFID on October 30, 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.*