Comparison

Runestone Text Editor vs AI Prompt Developer

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

Head to head
About

Runestone Text Editor

A powerful plain text and code editor for iPhone and iPad. Offers syntax highlighting, line numbers, find and replace, and extensive customization options for developers and writers.

Highlights
  • Syntax highlighting for many languages
  • Customizable themes and fonts
  • Advanced find and replace
  • Line numbers and cursor location
  • Code formatting with Prettier.js
  • Multiple windows on iPad
Features
Read full description

A plain text editor with syntax highlighting, line numbers, search and replace, page guide, and much more. It's like TextEdit but more powerful and optimised for iPhone and iPad. Runestone is made by a single person with a love for text editors and a vision of building the most lightweight text editor for iPhone and iPad that still has the core features for editing code. Features: - Syntax highlighting of many languages including HTML, JavaScript, JSON, Markdown, Swift, Python, PHP, YAML, and many more. - Select one of the twelve standard themes including popular themes like Tomorrow, Dracula, Solarized, and One Dark Pro. - Innovative find and replace for searching and modifying text while still viewing your file. - Choose font and font size, including support for custom fonts imported using another third-party app. - Show the line and column the cursor is located on. - Uses the standard document browser for an experience similar to the Files app. - Quickly navigate to a specific line. - Automatically close opening brackets and quotes. - Multiple windows on the iPad. - Format code using Prettier.js. Supported languages include CSS,HTML, JavaScript, JSON, PHP and more. - Choose text encoding between popular encodings like UTF-8, UTF-16, ISO Latin 1, and many more. - Enable or disable autocorrection, autocapitalization, and smart punctuation. - Set default file extension of new files. - Open files in Runestone from the Share Sheet. - Print documents. Premium features: - Choose between eight app icons. - Show line numbers. - Highlight the selected line. - Increase line height and letter spacing. - Disable line wrapping to allow horizontal scrolling. - Show tabs, spaces, and line breaks using a selected symbol. - Enable page guide at a specific column to easily tell when lines are getting too long. - Add vertical and horizontal overscroll. - Remember the selected language per file. - Save file extensions and filenames that should always be treated as plain text files. - Enable soft tabs and choose the width of the tab character. - Specify whether pressing the tab key should insert a tab or indent the line. - Adjust the scaling of Markdown headings and disable highlighting of code blocks in Markdown. Runestone was built on the open-source framework with the same name. Find more information on the Runestone framework at github.com/simonbs/runestone

About

AI Prompt Developer

Create and manage AI prompts with system instructions, role definitions, and file attachments. This tool offers real-time token, word, and character counts, and syncs across devices via iCloud. It's designed for developers and creatives to refine AI responses efficiently.

Highlights
  • System instructions, role definitions, file attachments
  • SwiftData + iCloud integration for cross-device sync
  • Attach multiple files to a single prompt
  • Streamlined interface for prompt management
  • Real-time token, word, and character counts
  • Mobile-friendly code snippet management
Features
Read full description

Welcome to AI Prompt Creator, your all-in-one solution for creating and managing AI prompts on the go. Whether you’re a developer seeking quick code snippets or a creative looking to refine your writing prompts, our app combines system instructions, role definitions, file attachments, and direct user input—giving you a powerful toolkit to shape AI responses exactly as you want them. Key Features: • SwiftData + iCloud Integration: Keep your custom prompt presets in sync across devices with secure CloudKit technology. • Multiple Files in One Prompt: Attach snippets of code, text files, or any relevant document to deepen context for your AI. • Streamlined Interface: Effortlessly toggle between system, role, and user prompts, then copy your final text with a single tap. • Instant Counters: Stay informed with real-time token, word, and character counts. • Mobile-Friendly Programming: Using AI for coding suggestions? PromptBuilder helps you store, review, and refine your code segments from anywhere, leveraging AI’s capabilities to enhance your programming experience—even on the move. Explore new ways to collaborate with AI, speed up your coding workflow, or generate creative prompts that spark fresh ideas. PromptBuilder simplifies your process so you can focus on producing outstanding results.

Screenshots

Runestone Text Editor4 screens
AI Prompt Developer4 screens

Verdict

The call

The clearest difference is price: Runestone Text Editor at Free against AI Prompt Developer's $1.99. Runestone Text Editor also leads on ratings volume (2K vs 4) and device support (4 vs 2). AI Prompt Developer's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 2 weeks). On ads 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

Runestone Text Editor is free to download; AI Prompt Developer costs $1.99 up front. Runestone Text Editor sells 1 one-off in-app purchase. AI Prompt Developer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AI Prompt Developer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Runestone Text Editor has 2K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 76% of Runestone Text Editor's written reviews are positive against 100% of AI Prompt Developer's.

UpkeepUpdate frequency

Runestone Text Editor ships an update every 2 weeks, AI Prompt Developer every 2 days. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

Scorecard10 real differences · 1 level
Runestone Text Editor versus AI Prompt Developer: the parameters behind the verdict, then further details
ParameterRunestone Text EditorAI Prompt Developer
PriceFree — better$1.99
Rating4.7 (2K ratings)5.0 (4 ratings) — better
Positive reviews76.2% of reviews100.0% of reviews — better
Number of ratings2K — better4
Update frequencyEvery 2 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank#38 — better#178
DevicesiPhone, iPad, iPod, Vision Pro — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size64 MB3 MB
Age rating4+4+
DeveloperSimon B. StøvringManuel Streit

Customer experience

Runestone Text Editor

All ratings1,962 ratings
Positive93.5%
Neutral2.3%
Negative4.1%
Written reviews353 reviews
Positive76.2%
Neutral9.6%
Negative14.2%

AI Prompt Developer

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Runestone Text Editor

Reported bugs

6 issues
  • Disappearing files
  • Difficulty pasting text
  • Scroll position not saved
  • Hangs on startup
  • Trouble opening large files
Show 1 more
  • Issues after iOS updates

Requested features

6 requests
  • Markdown preview
  • Code folding
  • Syntax highlighting for more languages
  • Ability to run/execute code
  • Multiple file/window support
Show 1 more
  • Improved undo/redo functionality

AI Prompt Developer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Runestone Text Editor

One-time1
  • Premium$9.99
None

AI Prompt Developer

No in-app purchases

Questions

Is Runestone Text Editor free?
Runestone Text Editor is free to download, with in-app purchases available.
Is AI Prompt Developer free?
AI Prompt Developer costs $1.99, with no in-app purchases.
Which has better reviews, Runestone Text Editor or AI Prompt Developer?
AI Prompt Developer is rated higher. Runestone Text Editor averages 4.7 out of 5 from 2K ratings, while AI Prompt Developer averages 5.0 from 4 ratings.
Do Runestone Text Editor or AI Prompt Developer have ads?
Neither Runestone Text Editor nor AI Prompt Developer shows ads.
Which is updated more often, Runestone Text Editor or AI Prompt Developer?
Runestone Text Editor ships an update every 2 weeks, and AI Prompt Developer every 2 days. Most recently, Runestone Text Editor was updated on October 12, 2026 and AI Prompt Developer on October 6, 2026.
Which is more popular, Runestone Text Editor or AI Prompt Developer?
Runestone Text Editor currently peaks at #38 in the App Store charts, and AI Prompt Developer at #178. Chart position reflects recent download velocity rather than total install base.

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