# AddCalc PRO vs Obsideck

The clearest difference is price: Obsideck at Free against AddCalc PRO's $0.99. Obsideck also leads on review sentiment (100% vs 86%). AddCalc PRO's advantage is iOS requirement (15.6 vs 26.0). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Obsideck is free to download; AddCalc PRO costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AddCalc PRO ships an update every 6 weeks, Obsideck every 2 months. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AddCalc PRO | Obsideck |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/obsideck/id6780370405/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Paid | Paid |
| Size | 4 MB | 4 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shinichi Aokawa](https://appshunter.io/developer/502862033) | [Shota Hori](https://appshunter.io/developer/1442007331) |

## What reviewers say

### AddCalc PRO

[App page](https://appshunter.io/ios/app/addcalc-pro/id502862030)

This calculator app offers both standard and adder calculation modes, with customizable themes, sounds, and editing features. It allows for easy copying of logs and totals, and supports various calculation functions for accounting and everyday use.

**Highlights:** Dual calculator modes (adder and standard), Customizable button design, background, and brightness, Selectable sound effects, Input log editing and recalculation, Voice reading of input log, Copy log and total functionality, Decimal point and rounding switching

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

**In-app purchases:** none


### Obsideck

[App page](https://appshunter.io/ios/app/obsideck/id6780370405)

A casual Markdown note-taking app for iPhone and iPad that displays your notes as a grid of cards. It allows for quick previews, following links and tags, and editing with a focused editor, all while respecting your privacy.

**Highlights:** Card grid for casual browsing, Rich Markdown preview, Wiki link navigation, Tappable tags, Interactive task lists, Focused Markdown editor, Privacy-focused, no account needed

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

**In-app purchases:** none


## Frequently asked questions

### Is AddCalc PRO free?

AddCalc PRO costs $0.99, with no in-app purchases.

### Is Obsideck free?

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

### Do AddCalc PRO or Obsideck have ads?

Neither AddCalc PRO nor Obsideck shows ads.

### Which is updated more often, AddCalc PRO or Obsideck?

AddCalc PRO ships an update every 6 weeks, and Obsideck every 2 months. Most recently, AddCalc PRO was updated on November 6, 2026 and Obsideck on October 31, 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.*