# Calculator HD Pro Lite vs Fast Write down

The clearest difference is update cadence: Fast Write down at every 3 weeks against Calculator HD Pro Lite's every 2 months. Fast Write down also leads on iOS requirement (11.0 vs 15.2). On price, ads, 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.

Calculator HD Pro Lite ships an update every 2 months, Fast Write down every 3 weeks. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Calculator HD Pro Lite | Fast Write down |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (51K ratings)](https://appshunter.io/ios/app/calculator-hd-pro-lite/id571121141/reviews)** | — |
| Number of ratings | **51K** | — |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 47 MB | 75 MB |
| Requires iOS | 15.2 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cider Software LLC](https://appshunter.io/developer/465180756) | [玉波 刘](https://appshunter.io/developer/1699269120) |

## What reviewers say

### Calculator HD Pro Lite

[App page](https://appshunter.io/ios/app/calculator-hd-pro-lite/id571121141)

This app offers a user-friendly calculator with large buttons and extensive customization options. It features a dual-line display to see input and results simultaneously, saves your calculation history, and provides full scientific functions. Personalize layouts, themes, and even button symbols to suit your needs.

**Highlights:** Dual-line display, Calculation history, Full scientific functions, Customizable layouts and themes, Big buttons, Email history

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 📝 Keeps calculation history
- 💡 Customizable layout and themes
- 🔢 Large, clear numbers
- 🧮 Variety of functions (basic, scientific, etc.)

**What reviewers complain about**

- 💢 Intrusive ads, especially between calculations
- 🙄 Ads that are difficult to close
- 🤦‍♂️ Ads that interrupt workflow
- 🤑 Expensive to remove ads
- 🚫 Gambling ads

**Reported bugs**

- Calculation errors with very large numbers
- Crashes after recent update
- Decimal point displayed as comma

**Requested features**

- Dark mode option
- Ability to sync calculation history across devices
- More advanced math functions (e.g. dms/dd)
- Customizable button layout
- Ability to disable ads without paying


### Fast Write down

[App page](https://appshunter.io/ios/app/fast-write-down/id6453753231)

**In-app purchases:** none


## Frequently asked questions

### Is Calculator HD Pro Lite free?

Calculator HD Pro Lite is free to download, with no in-app purchases.

### Is Fast Write down free?

Fast Write down is free to download, with no in-app purchases.

### Do Calculator HD Pro Lite or Fast Write down have ads?

Both Calculator HD Pro Lite and Fast Write down show ads.

### Which is updated more often, Calculator HD Pro Lite or Fast Write down?

Calculator HD Pro Lite ships an update every 2 months, and Fast Write down every 3 weeks. Most recently, Calculator HD Pro Lite was updated on October 18, 2026 and Fast Write down on October 6, 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.*