Comparison

O'der stack vs MrBrowser

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

Head to head
About

O'der stack

Features
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O'der stack is a scientific calculator that is precise for up to 38 digits and is highly flexible. It can be used for various purposes, from learning to professional use, and has many functions that are convenient when mastered. The formulas described can be saved together with the results of the calculations and easily shared among members. Also, labels and memos can be set for formulas as well as each item that makes up the formulas. For example, by adding the label "radius" to "50" in 2 x 50 x π, it is possible to make the meaning of the formula even clearer. It is also perfect for entering explanations of formulas as memos and using them as tools to assist in learning. O'der stack offers two plans, the Pro plan which offers unlimited use of all functions, as well as the Free plan which makes it usable as an easy-to-use scientific calculator. —Functions— 1. A powerful editing function that allows partial overwriting of values without erasing the formula 2. Label and memo functions to support the understanding of formulas 3. A clipboard function that allows formulas to be pasted in notebooks, etc. 4. Setting the precision of calculations from 0 digits to 38 digits 5. Setting units (degrees/radians) for trigonometric functions 6. Setting the format of displaying results of calculations (normal notation, scientific notation, and percentage notation) 7. Basic functions (exponentiation and nth root) 8. Undo function —Pro plan— Please download O'der stack and try out the Pro plan for free for seven days. In addition to all the functions in the Free plan, the Pro plan allows for the activation of even more convenient functions. 1. Functions to save and load formulas and calculation histories 2. Function to share formulas and calculation histories 3. A sub-formula function that allows for the breakdown into several formulas and simple entry 4. 18 types of versatile and widely-used functions 5. 652 highly precise numerical and physical constants and observed values 6. Setting the format of displaying results of calculations (binary, octal, hexadecimal)        - Each item can be selected from 8bit, 16bit, 24bit, 32bit, 64bit and 128bit.        - Supports negative values and decimal points.        - Negative values are displayed in complement. After the free trial has ended, if you would like to continue to use the Pro plan, a purchase of a non-autorenew-subscriptionis required. For a subscription, you can choose either a monthly purchase or yearly purchase, and the yearly purchase allows you to enjoy a discount worth two months of monthly purchases. Payment will be charged to your Apple ID account at the confirmation of purchase. If you purchase a plan during the effective period, it will be extended by the number of days of the purchased plan from the end date. The plan is effective on all devices linked to the purchased Apple ID account. Privacy policy https://ictfractal.github.io/official/PrivacyPolicy.html Terms of service https://ictfractal.github.io/official/AppTerms.pdf Disclaimer ICT Fractal Inc. does not guarantee the accuracy, credibility, and compatibility of the results of calculations and information provided through this app. Furthermore, it does not bear the responsibility for direct or indirect damages that might occur through this app.

About

MrBrowser

Experience unparalleled browsing with a unique dual-screen layout and intuitive one-handed controls. Enjoy immersive VR video playback and a minimalist interface designed for focused content consumption. Enhanced privacy features ensure a secure and seamless online experience.

Highlights
  • One-handed operation
  • Dual-screen browsing
  • Seamless screen ratio adjustment
  • Minimalist UI
  • VR video playback
  • FaceID lock
Features
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2画面で見比べる。片手で操作する。VR動画を自由な視点で楽しむ。 mrBrowserは、いつものWebをもっと快適に使うためのブラウザです。 【上下2画面で、同時にチェック】 Webページを上下に並べて閲覧できます。画面の境界を動かして、見たい内容に合わせて表示サイズを調整。タブ一覧やVRメニューから切り替えられます。 【左右どちらからでも、スワイプで戻る】 左端からのスワイプに加え、右端から左へのスワイプでも前のページへ戻れます。設定から左利きモードへの切り替えも可能です。 【左右2分割のVR動画を、1画面で】 対応するVR動画を、ひとつの画面で視点を動かしながら楽しめます。画面をなぞるスワイプ操作に加え、スマホの向きに合わせて視点が動くジャイロ操作にも対応しています。 【タブを見渡して、すばやく切り替え】 カード形式のタブ一覧から、開いているページを確認。2画面表示中は、上画面と下画面のタブをそれぞれ管理できます。 【ブックマークを、使いやすく整理】 お気に入りのページをフォルダ分けして保存。複数のブックマークを選択し、まとめて移動・削除できます。 【操作ガイドで、はじめてでも安心】 初回起動時に操作方法をご案内。あとからメニューの「操作ガイド」でいつでも見返せます。 【アプリロックに対応】 Face IDやパスコードで、アプリの利用をロックできます。 ※VR視聴は対応する動画形式・サイトで利用できます。 ※アプリ内に広告が表示されます。

Screenshots

O'der stack4 screens
MrBrowser4 screens

Verdict

The call

The clearest difference is in-app purchases: MrBrowser at none against O'der stack's 3. MrBrowser also leads on update cadence (every 3 weeks vs every 3 months). O'der stack's advantage is iOS requirement (15.6 vs 26.2). On price, ads and device support 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

Both are free to download. O'der stack sells 3 one-off in-app purchases. MrBrowser asks for nothing beyond the download.

UpkeepUpdate frequency

O'der stack ships an update every 3 months, MrBrowser every 3 weeks. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 5 level
O'der stack versus MrBrowser: the parameters behind the verdict, then further details
ParameterO'der stackMrBrowser
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.2
Further details — not scored
Size59 MB9 MB
Age rating4+17+
DeveloperICT Fractal Inc.JUNPEI YOSHINO

In-app purchases

3 purchases

O'der stack

One-time3
  • Free trial for 7 days.Free
  • Activate for 1 month.$0.99
  • Activate for year.$9.99
None

MrBrowser

No in-app purchases

Questions

Is O'der stack free?
O'der stack is free to download, with in-app purchases available.
Is MrBrowser free?
MrBrowser is free to download, with no in-app purchases.
Do O'der stack or MrBrowser have ads?
Neither O'der stack nor MrBrowser shows ads.
Which is updated more often, O'der stack or MrBrowser?
O'der stack ships an update every 3 months, and MrBrowser every 3 weeks. Most recently, O'der stack was updated on October 18, 2026 and MrBrowser on October 25, 2026.

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