# NeoCalcs Lite vs calculator DUO

The clearest difference is in-app purchases: NeoCalcs Lite at none against calculator DUO's 1. calculator DUO's advantage is update cadence (every 10 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. calculator DUO sells 1 one-off in-app purchase. NeoCalcs Lite asks for nothing beyond the download.

NeoCalcs Lite ships an update every 2 months, calculator DUO every 10 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | NeoCalcs Lite | calculator DUO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/calculator-duo/id6739860116/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 18 MB |
| Requires iOS | **15** | 16.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YONEKAWA Hideki](https://appshunter.io/developer/333475314) | [Wenbin lei](https://appshunter.io/developer/1787331500) |

## What reviewers say

### NeoCalcs Lite

[App page](https://appshunter.io/ios/app/neocalcs-lite-calculator/id855293368)

**In-app purchases:** none


### calculator DUO

[App page](https://appshunter.io/ios/app/calculator-duo/id6739860116)

This utility app allows for comfortable one-handed calculations by letting you reposition the keypad. It also provides features to save and reuse past answers, correct input with a swipe, and handle both everyday and scientific calculations, including date and time functions.

**Highlights:** One-handed keypad repositioning, Save and reuse past answers, Swipe to delete/correct input, Everyday and scientific functions, Date and time calculations, Customizable themes and display

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is NeoCalcs Lite free?

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

### Is calculator DUO free?

calculator DUO is free to download, with in-app purchases available.

### Do NeoCalcs Lite or calculator DUO have ads?

Both NeoCalcs Lite and calculator DUO show ads.

### Which is updated more often, NeoCalcs Lite or calculator DUO?

NeoCalcs Lite ships an update every 2 months, and calculator DUO every 10 days. Most recently, NeoCalcs Lite was updated on November 1, 2026 and calculator DUO on November 4, 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.*