# PCalc Lite vs Firmware Manager for AR.Drone

The clearest difference is rating: PCalc Lite at 4.4 against Firmware Manager for AR.Drone's 3.7. PCalc Lite also leads on review sentiment (82% vs 49%) and ratings volume (214 vs 26). Firmware Manager for AR.Drone's advantage is in-app purchases (none vs 10) and iOS requirement (4.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PCalc Lite sells 10 one-off in-app purchases. Firmware Manager for AR.Drone asks for nothing beyond the download.

PCalc Lite holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: PCalc Lite has 214 ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 82% of PCalc Lite's written reviews are positive against 49% of Firmware Manager for AR.Drone's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | PCalc Lite | Firmware Manager for AR.Drone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (214 ratings)](https://appshunter.io/ios/app/pcalc-lite/id300311831/reviews)** | [3.7 (26 ratings)](https://appshunter.io/ios/app/firmware-manager-for-ardrone/id426009871/reviews) |
| Number of ratings | **214** | 26 |
| Positive reviews | **82.5% of reviews** | 49.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 79 MB | 1 MB |
| Requires iOS | 15.0 | **4.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLA Systems Ltd.](https://appshunter.io/developer/284666225) | [Max Bäumle](https://appshunter.io/developer/392544441) |

## What reviewers say

### PCalc Lite

[App page](https://appshunter.io/ios/app/pcalc-lite/id300311831)

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

**Highlights:** Optional RPN mode, Multiple undo and redo, Unit conversions and constants, Two stylish themes, Apple Watch app

**Features:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theme Pack | $0.99 | one-time |
| Power User Pack | $0.99 | one-time |
| Multiple Line Pack | $0.99 | one-time |
| Conversion Pack | $0.99 | one-time |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Programmer Pack | $2.99 | one-time |
| Engineer Pack | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| Complete Pack | $9.99 | one-time |

**What reviewers like**

- 🚀 Fast and responsive
- 👍 Clean and intuitive interface
- 💡 Customizable themes and settings
- 🚀 Efficient performance
- 👍 Useful conversion tools

**What reviewers complain about**

- 🐛 Occasional lags and crashes
- 🔒 Lack of dark mode support
- 🔒 Inconsistent icon appearance after upgrades
- 🔒 Limitations in RPN mode on Apple Watch
- 🔒 Lack of financial calculator functions

**Reported bugs**

- Calculations sometimes produce unexpected results
- Upside-down text censorship feature is problematic
- Purchased features not always accessible on Apple Watch

**Requested features**

- Add option to display thousands separators
- Implement a history function to review past calculations
- Provide more customization options for the widget
- Add support for sexagesimal angle input and conversion


### Firmware Manager for AR.Drone

[App page](https://appshunter.io/ios/app/firmware-manager-for-ardrone/id426009871)

Easily upgrade or downgrade your AR.Drone's firmware to any desired version. Receive notifications when new firmware becomes available for your device. Troubleshoot firmware installation issues by following simple on-device reset instructions.

**Highlights:** Upgrade firmware, Downgrade firmware, Any firmware version support, New firmware notifications, Firmware reset guide

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

**In-app purchases:** none


## Frequently asked questions

### Is PCalc Lite free?

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

### Is Firmware Manager for AR.Drone free?

Firmware Manager for AR.Drone is free to download, with no in-app purchases.

### Which has better reviews, PCalc Lite or Firmware Manager for AR.Drone?

PCalc Lite is rated higher. PCalc Lite averages 4.4 out of 5 from 214 ratings, while Firmware Manager for AR.Drone averages 3.7 from 26 ratings.

### Do PCalc Lite or Firmware Manager for AR.Drone have ads?

Neither PCalc Lite nor Firmware Manager for AR.Drone shows ads.

### Which is updated more often, PCalc Lite or Firmware Manager for AR.Drone?

PCalc Lite ships an update every 2 months, and Firmware Manager for AR.Drone every 2 months. Most recently, PCalc Lite was updated on October 31, 2026 and Firmware Manager for AR.Drone on November 1, 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.*