# SD vs Septuple Calc

The clearest difference is ads: SD at none against Septuple Calc's shown. SD also leads on iOS requirement (13.0 vs 15.8.3). Septuple Calc's advantage is update cadence (every 2 weeks vs every 2 months). On price, 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.

SD ships an update every 2 months, Septuple Calc every 2 weeks. The most recent releases landed on October 4, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | SD | Septuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 50 MB | 36 MB |
| Requires iOS | **13.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Applied Concepts Incorporated](https://appshunter.io/developer/1439604257) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### SD

[App page](https://appshunter.io/ios/app/sddevice-manager/id6742332426)

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

**In-app purchases:** none


### Septuple Calc

[App page](https://appshunter.io/ios/app/septuple-calc/id6742341118)

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

**In-app purchases:** none


## Frequently asked questions

### Is SD free?

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

### Is Septuple Calc free?

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

### Do SD or Septuple Calc have ads?

Septuple Calc shows ads; SD does not.

### Which is updated more often, SD or Septuple Calc?

SD ships an update every 2 months, and Septuple Calc every 2 weeks. Most recently, SD was updated on October 4, 2026 and Septuple Calc on September 23, 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.*