Comparison

AddCalc PRO vs Obsideck

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AddCalc PRO

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
Read full description

Do you know the calculator of optimal adder method for an accounting calculation? (with the calculation method change function) Try it on iPhone and iPad you always carry around. 【Feature】 - This can switch an "adder calculator" and "ordinary calculator" - The design of a button can be chosen - The regulating function of a background color and brightness - Select your favorite sound from sound effects - Input log editing + recalculation function - Voice reading of the input log - Copy the log and total (paste to memo etc) - Display switching function digit after the decimal point (FULL · 0 ~ 6 digits) - The (up-truncation Ri rounded-off) Rounding switching function - 14 Number of significant digits - Always display "GT:Grand Total" - Always display "MR:Memory" - BS:BackSpace function 【How to use an adder calculator】 ”(10×10)+(5×5)-(6×5)=95” 10 [×] 10 [+=] 5 [×] 5 [+=] 6 [×] 5 [-] [GT] (10×10)Add(5×5)Add(6×5)Pull % Calculation example : 500 + (500 × 12%) = 560 500 [+=] 12 [%] [+=] 【How to use an ordinary calculator】 ”(10×10)+(5×5)-(6×5)=95” 10 [×] 10 [=][M+] 5 [×] 5 [=][M+] 6 [×] 5 [=] [M-][MR] Added to the Grand Total by "=" The continuous input will be "10×10+5×5-6×5=2595" % Calculation example : 500 + (500 × 12%) = 560 500 [+] 12 [%] [=]

About

Obsideck

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
Read full description

Your notes, as cards. Obsidian, made casual. Obsideck is a relaxed way to use your Obsidian notes on iPhone and iPad. Point it at any folder — your Obsidian notes in iCloud Drive, a local folder on your device, or anywhere the Files app can reach — and your notes appear as a tidy grid of cards. Tap a card for a quick preview, follow links and tags, check off tasks, and switch to a focused editor whenever you want to make a change. Everything stays fast and light — no heavy setup, no plugins to configure, just your notes, ready when you are. **Free to start, unlock once** Free to download: browse, search, edit, create notes, and use the preset themes. One Unlock adds pins, card colors, backlinks, the Custom theme, daily notes, and widgets — no subscription, Family Sharing supported. Existing buyers get everything at no extra cost. **A card grid for casual browsing** Your notes are laid out as cards in a masonry grid, like sticky notes. Sort by date modified, date created, or name. Reorder by dragging. With Unlock: pin notes to the top and color cards. Long-press a card for quick actions. **Themes** Choose Violet, Ocean, or Warm, or build a Custom theme: per-element colors, bold and italic, and code block colors. Adjust text size and line spacing for the preview and the editor in Appearance. **Daily notes and widgets** Obsideck reads your Obsidian daily-note settings and shows today's note on a Today card. Add New Note, Today, or Pinned widgets to your Home Screen; the data they show stays on your device. **Rich Markdown preview** - Headings, emphasis, lists, quotes, and code blocks - Frontmatter shown as a clean, structured panel - Callouts (`> [!note]`, `> [!warning]`, and more) rendered with icons - Images embedded with Obsidian syntax: `![[image.png]]` **Wiki links that actually work** Tap a `[[note]]` link to jump straight to that note. Obsideck searches all your notes to resolve links, supports aliases and heading links, and lists backlinks to the note you're reading; with Unlock, tap one to jump there. **Tappable tags** Tap any `#tag` to instantly search your notes for every one that uses it — inline tags and frontmatter tags alike. **Interactive task lists** Check and uncheck `- [ ]` task items right in preview — tap anywhere on the row, not just the checkbox. Your changes are written back to the file. **Edit with a focused editor** Switch to edit mode for syntax-highlighted Markdown editing. Changes auto-save back to the file, so your notes stay in sync with Obsidian and every other tool you use. **Privacy first** - No account or sign-in, and no servers of ours — only Apple's iCloud sync and App Store purchases - No ads, no tracking, no analytics - Your notes never leave your device or your own iCloud Drive - Obsideck reads and writes only the folder you explicitly select **Please note** - Obsideck is a companion reader/editor for Markdown notes; it is not affiliated with Obsidian or Obsidian.md. - Obsideck is an independent app and is not affiliated with, endorsed, or sponsored by Dynalist Inc. Obsidian is a trademark of Dynalist Inc. - The app works with plain Markdown (.md) files. Some advanced Obsidian plugin syntax may not be rendered. - Obsideck is designed for everyday note collections — roughly up to a few hundred notes per folder and a few thousand notes in total. Performance is not guaranteed for very large collections beyond this range. - To use your Obsidian notes, keep them somewhere the Files app can reach (for example, iCloud Drive). - Card layout (order, pins, and colors) is saved in a small hidden `.obsideck` folder at the top of the folder you chose, so it syncs across your devices along with your notes (for example, via iCloud Drive). It never modifies your note files, and Obsidian simply ignores the folder. Deleting the `.obsideck` folder resets the layout to default. Terms of Use: https://unadongames.com/obsideck/terms.html Privacy Policy: https://unadongames.com/obsideck/privacy.html

Screenshots

AddCalc PRO4 screens
Obsideck4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
AddCalc PRO versus Obsideck: the parameters behind the verdict, then further details
ParameterAddCalc PROObsideck
Price$0.99Free — better
Rating—5.0 (1 ratings) — better
Positive reviews85.7% of reviews100.0% of reviews — better
Number of ratings—1 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size4 MB4 MB
Age rating4+4+
DeveloperShinichi AokawaShota Hori

Customer experience

AddCalc PRO

Written reviews14 reviews
Positive85.7%
Neutral7.1%
Negative7.1%

Obsideck

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AddCalc PRO

No in-app purchases

None

Obsideck

No in-app purchases

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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