# Zinwell Smart Extender vs Novemdecuple Calc

The clearest difference is ads: Zinwell Smart Extender at none against Novemdecuple Calc's shown. Novemdecuple Calc's advantage is update cadence (every 2 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Zinwell Smart Extender ships an update every 4 months, Novemdecuple Calc every 2 weeks. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Zinwell Smart Extender | Novemdecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 3 MB | 36 MB |
| Requires iOS | **14.5** | 15.8.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZINWELL CORPORATION](https://appshunter.io/developer/1019370251) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Zinwell Smart Extender

[App page](https://appshunter.io/ios/app/zinwell-smart-extender/id1490400466)

**Features:** macOS Compatibility

**In-app purchases:** none


### Novemdecuple Calc

[App page](https://appshunter.io/ios/app/novemdecuple-calc/id6742386396)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zinwell Smart Extender free?

Zinwell Smart Extender is free to download, with no in-app purchases.

### Is Novemdecuple Calc free?

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

### Do Zinwell Smart Extender or Novemdecuple Calc have ads?

Novemdecuple Calc shows ads; Zinwell Smart Extender does not.

### Which is updated more often, Zinwell Smart Extender or Novemdecuple Calc?

Zinwell Smart Extender ships an update every 4 months, and Novemdecuple Calc every 2 weeks. Most recently, Zinwell Smart Extender was updated on October 25, 2026 and Novemdecuple Calc on October 7, 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.*