# ▸ Calculator + vs Lúa

The clearest difference is price: Lúa at Free against ▸ Calculator +'s $1.99. Lúa also leads on in-app purchases (none vs 4) and update cadence (every 3 days vs every 6 weeks). ▸ Calculator +'s advantage is iOS requirement (8.0 vs 15). On ads and device support there is nothing between them.

Lúa is free to download; ▸ Calculator + costs $1.99 up front. ▸ Calculator + sells 4 one-off in-app purchases. Lúa asks for nothing beyond the download.

▸ Calculator + ships an update every 6 weeks, Lúa every 3 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ▸ Calculator + | Lúa |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (904 ratings)](https://appshunter.io/ios/app/calculator-plus/id473884845/reviews)** | — |
| Number of ratings | **904** | — |
| Positive reviews | 75.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 63 MB |
| Requires iOS | **8.0** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PPCLINK Software](https://appshunter.io/developer/833424538) | [Vo Hoang Tu](https://appshunter.io/developer/1895314877) |

## What reviewers say

### ▸ Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus/id473884845)

This app offers a comprehensive suite of 12 calculators, including scientific, currency, unit, and finance functions. It features advanced modes, extensive formula support, and a user-friendly interface for all calculation needs.

**Highlights:** 12 specialized calculators, Over 800 formulas, Scientific, RPN, and String modes, Unit and currency conversion, Finance and date/time calculations, Equation solver and graphing, History and expression export

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Formula Toolkit | $0.99 | one-time |
| Periodic Table | $0.99 | one-time |
| UI Upgrade | $0.99 | one-time |
| Biorhythm | $0.99 | one-time |

**What reviewers like**

- 👍 Handy to use application
- 🔢 Great calculator
- 📊 Excellent for engineering & other use
- 🔢 Very useful
- 🔢 Excellent interface

**What reviewers complain about**

- 🐛 Date function does not fit iPhone screen
- 🐛 Alternate calculators no longer work
- 🐛 Good calculator but not all function work
- 🐛 Overall Good, but bugs have crept it
- 🐛 Needs an update for new phones

**Reported bugs**

- Date/Time screen cutoff at bottom and missing keyboard icon
- Currency exchange not working
- Periodic Taple option of HiCalcac pro is not compatible eith iOs 10
- Crashes in iOS 10
- Gig to meg conversion is incorrect

**Requested features**

- Dark mode option
- Advanced analytics dashboard
- Landscape mode support
- Equation solver for non-polynomials
- Auto-display of graph coordinates


### Lúa

[App page](https://appshunter.io/ios/app/lua/id6763438738)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ▸ Calculator + free?

▸ Calculator + costs $1.99, and also offers in-app purchases.

### Is Lúa free?

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

### Do ▸ Calculator + or Lúa have ads?

Neither ▸ Calculator + nor Lúa shows ads.

### Which is updated more often, ▸ Calculator + or Lúa?

▸ Calculator + ships an update every 6 weeks, and Lúa every 3 days. Most recently, ▸ Calculator + was updated on October 13, 2026 and Lúa 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.*