Comparison

GAllery vs HTML Opener

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

Head to head
About

GAllery

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生成AIに書いてもらったコードを、貼り付けるだけでiPhoneの中で動かせます。パソコンは要りません。 生成AIにアプリを作ってもらったものの、動かす場所がなくて困ったことはありませんか。GAlleryは、その受け皿です。コードをコピーして貼り付け、実行を押すだけ。言語は自動で見分けます。 HTML、CSS、JavaScript、Pythonに対応。作ったものはアプリとして保存され、ホーム画面のような一覧からいつでも開けます。 主な機能 ・コードを貼り付けて、その場で実行 ・HTML、CSS、JavaScript、Pythonに対応 ・言語の自動判定 ・複数ファイルや画像をまとめて保存 ・コードの表示、編集、複製、削除 ・実行中の一時停止と速度変更 ・アイコン、名前、並び順を設定 ・コードと設定は端末内に保存 ・利用者のコードから外部ネットワークへの通信を遮断 ・広告、アカウント登録、アクセス解析なし こんな方に ・生成AIでアプリやツールを作ってみたい方 ・パソコンを持っていない、または手元にない方 ・プログラミングを学びはじめた方 ・思いついた小さな道具を、その場で形にしたい方 無料プランでは、アプリを1つ保存できます。 有料プラン「GAllery Pro」では、保存できるアプリ数の制限がなくなり、壁紙、テーマカラー、アイコンのサイズと名前表示をカスタマイズできます。GAllery Proは1か月ごとに自動更新されます。価格は購入画面に表示され、Apple Accountの設定からいつでも管理・解約できます。 利用規約: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ プライバシーポリシー: https://sites.google.com/view/tworks-gallery-6799646416

About

HTML Opener

This app renders local HTML, CSS, and JavaScript files in a real browser on your iPhone and iPad. It allows you to test web prototypes and view interactive pages without needing a computer or local server. Easily open entire project folders and toggle between desktop and mobile views.

Highlights
  • Renders local HTML, CSS, JavaScript
  • Opens entire project folders
  • Desktop and mobile view toggle
  • Fullscreen mode for web apps
  • Quick switcher for recent projects
  • Auto-launch primary tool
Features
Read full description

When you open an HTML file in the iPhone Files app, iOS just dumps lines of raw code on your screen. Buttons do not work, styles break, and Safari cannot open local file links. HTML Opener fixes that. It runs your local HTML, CSS, JavaScript, and images in a real WebKit browser directly on your iPhone and iPad. No Mac, no terminal, and no local server required. WHAT IT SOLVES - Files app dumps raw code and text on screen instead of rendering the webpage - Safari has no address bar option to open local file:// links - Opening a single file breaks CSS styles and image assets in neighboring folders - Setting up a local server on your computer just to check mobile layout is tedious REAL WEBKIT BROWSER RENDERING Built on iOS's native WKWebView engine. Buttons, forms, CSS styling, canvas animations, and modern JavaScript run exactly as they would in Safari. OPEN AN ENTIRE PROJECT FOLDER Select a folder containing style.css, script.js, and an images directory alongside your HTML file. All relative file paths resolve automatically with zero broken images or missing styles. DESKTOP & MOBILE VIEW TOGGLE Switch between phone layout and 1024px desktop view with a single tap. Review horizontal dashboards, data tables, and desktop web tools without broken layouts. FULLSCREEN MODE Hide navigation bars and margins to give your web content the entire display. Web apps and tools feel like installed native apps. FOUR SIMPLE ACTIONS 1. Open a local file or folder 2. Quick Switcher to jump between recent projects 3. Auto-launch your primary tool as soon as the app starts 4. Clear cache, toggle dark theme, and customize display options WHO IT IS FOR - Anyone stuck when iPhone opens HTML as raw code - Developers and designers testing web prototypes on actual iOS hardware - Anyone running self-built dashboards, calculators, or tools on the go - Students learning web development who want instant mobile testing PRO (ONE-TIME PURCHASE, NEVER A SUBSCRIPTION) Removes ads completely. Pay once, use forever. Compatible with iPhone and iPad, iOS 17.0 or later. Stop dealing with raw code dumps. Open real interactive web pages with HTML Opener.

Screenshots

GAllery3 screens
HTML Opener4 screens

Verdict

The call

The clearest difference is in-app purchases: GAllery at none against HTML Opener's 1. GAllery also leads on ads (none vs shown). HTML Opener's advantage is chart position (#194 vs unranked). On price, update cadence, device support and iOS requirement 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. HTML Opener sells 1 one-off in-app purchase. GAllery asks for nothing beyond the download.

UpkeepUpdate frequency

GAllery ships an update every 5 days, HTML Opener every 4 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
GAllery versus HTML Opener: the parameters behind the verdict, then further details
ParameterGAlleryHTML Opener
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 daysEvery 4 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Best chart rank—#194 — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size16 MB12 MB
Age rating4+4+
DeveloperDaisuke TsurukawaGASHIMA LAB

In-app purchases

None

GAllery

No in-app purchases

1 purchases

HTML Opener

One-time1
  • HTML Opener PRO$4.99

Questions

Is GAllery free?
GAllery is free to download, with no in-app purchases.
Is HTML Opener free?
HTML Opener is free to download, with in-app purchases available.
Do GAllery or HTML Opener have ads?
HTML Opener shows ads; GAllery does not.
Which is updated more often, GAllery or HTML Opener?
GAllery ships an update every 5 days, and HTML Opener every 4 days. Most recently, GAllery was updated on October 25, 2026 and HTML Opener on October 26, 2026.

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