O'der stack vs mrBrowser
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O'der stack
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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.
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.
- One-handed operation
- Dual-screen browsing
- Seamless screen ratio adjustment
- Minimalist UI
- VR video playback
- FaceID lock
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【主な機能と特徴】 ・片手で完結する極上の操作感 スマートフォンの大画面化に伴う「指が届かない」ストレスをゼロに。 右端から左へのスワイプで「戻る」、右側に配置された独立ボタンで「進む」。手の小さな方でも、右手親指ひとつですべての操作が完結します。 設定画面から「左利きモード」への切り替えもワンタップで可能。すべてのユーザーに寄り添う設計です。 ・快適な上下2画面ブラウジング 画面を上下に分割し、同時に2つのWebサイトを閲覧可能! 「動画を見ながらSNSをチェック」「攻略サイトを見ながらゲーム」「翻訳しながら海外ニュースを読む」など、使い方は無限大。 画面中央のバーをスワイプするだけで表示面積の割合をシームレスに変更でき、上下画面の入れ替えもスムーズに行えます。 ・没入感を高めるミニマルUI Webコンテンツの閲覧を邪魔しない、徹底してシンプルで洗練されたインターフェース。 各種メニューは半透明の小窓(フローティング)で表示され、必要最小限のスペースしか占有しません。背景に溶け込む美しいデザインで、ブラウジングそのものに集中できます。 ・ 迫力のVR動画再生モード Web上の左右に分割されたVR動画を、スマートフォンの画面一つで迫力あるVR体験へと変換! ジャイロセンサーに完全対応しており、スマートフォンを傾けるだけで360度見回すことが可能。複雑な設定なしで、より直感的で没入感のあるVR世界を楽しめます。 ・プライバシー保護 FaceIDロックに対応。 【こんな方におすすめ!】 スマホが大きくて片手でブラウザを操作しにくいと感じている方 動画視聴とネットサーフィンを同時に楽しみたい方(ながら見) シンプルで無駄のない洗練されたアプリが好きな方 Web上のVRコンテンツを手軽に、かつ本格的に楽しみたい方 今すぐ「mrBrowser」をダウンロードして、これまでにない快適なブラウジングを体験してください!
Screenshots
Verdict
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
Both are free to download. O'der stack sells 3 one-off in-app purchases. mrBrowser asks for nothing beyond the download.
O'der stack ships an update every 3 months, mrBrowser every 3 weeks. The most recent releases landed on October 1, 2026 and September 21, 2026 respectively.
| Parameter | O'der stack | mrBrowser |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 59 MB | 9 MB |
| Age rating | 4+ | 17+ |
| Developer | ICT Fractal Inc. | JUNPEI YOSHINO |
In-app purchases
O'der stack
- Free trial for 7 days.Free
- Activate for 1 month.$0.99
- Activate for year.$9.99
mrBrowser
No in-app purchases









