AI Prompt Modifier vs ContextStacker
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
AI Prompt Modifier
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### Transform Your AI Interactions with AI Prompt Modifier The AI Prompt Modifier extension enhances AI interactions by allowing you to customize, save, and manage prompt templates easily. Improve productivity with seamless modifications and tailored responses across multiple AI models. ### Key Features - Seamless Prompt Customization โ Add prefixes and suffixes to streamline responses - Group Management โ Organize and access prompt modifications easily - Import and Export โ Share your custom prompt groups or sync settings across devices - Undo Modifications โ Revert to the original prompt with one click - User Friendly Interface โ Clean and intuitive design for quick customization Now Supporting More AI Models Works with ChatGPT, DeepSeek Chat, DeepAI Chat, Google Gemini, Meta AI, Claude AI, Perplexity AI, Hugging Face Chat, YouChat, Poe by Quora, Pi by Inflection AI, and Kuki AI Upgrade your AI experience today with AI Prompt Modifier
ContextStacker
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ContextStacker brings your workspace knowledge into one focused chat. Sign in with the same account you use on the web, then ask questions across readable documents and enabled API resources in your workspace. Answers stream as they are generated, support Markdown, and include source references so you can understand where the information came from. KEY FEATURES โข Ask across your entire workspace without choosing a single document โข Continue conversations shared with the ContextStacker web app โข Receive streamed answers with Markdown formatting โข Review document and API sources behind each answer โข Start new conversations and revisit chat history โข Switch workspaces and manage your account โข View your current plan and usage Use the web app to add or manage documents and API resources or invite members. Workspace owners and billing managers can subscribe to Pro Annual or Business Annual in the iOS app. Each plan clearly shows its annual price and included services before purchase. ContextStacker supports English, Simplified Chinese, and Japanese. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: AI Prompt Modifier at none against ContextStacker's 2. AI Prompt Modifier also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17.0). ContextStacker's advantage is update cadence (every 3 days vs monthly). On price and ads there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. ContextStacker sells 2 in-app purchases, starting at $99.00 per year. AI Prompt Modifier asks for nothing beyond the download.
AI Prompt Modifier ships an update monthly, ContextStacker every 3 days. The most recent releases landed on September 28, 2026 and October 14, 2026 respectively.
| Parameter | AI Prompt Modifier | ContextStacker |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod, Mac โ better | iPhone, iPad |
| Requires iOS | 15.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 4 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Windmillcode LLC | ้นๆบ ้ฑ |
In-app purchases
AI Prompt Modifier
No in-app purchases
ContextStacker
- Pro Annual$99.001 Year
- Business Annual$199.001 Year
Questions
Is AI Prompt Modifier free?
Is ContextStacker free?
Do AI Prompt Modifier or ContextStacker have ads?
Which is updated more often, AI Prompt Modifier or ContextStacker?
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