PolyPDF vs Subtext
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PolyPDF
This app provides a PDF studio for drawing-set review and markup on iPad and iPhone. It allows users to open plans, navigate pages, measure to scale, add various annotations, and save their work. Advanced features are available via an optional Pro purchase.
- Drawing-set review
- PDF markup tools
- Measure to scale
- Add callouts, shapes, stamps
- Markup Table for findings
- Export and share PDFs
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PolyPDF brings drawing-set review and PDF markup to iPad and iPhone. Open plans from Files, move between pages, measure to scale, add markups, and save your work back to a PDF. Built for AEC work • Review multi-page plan sets with thumbnails and tabs. • Measure lengths and areas using a calibrated scale. • Add callouts, clouds, shapes, stamps, and freehand markup. • Count symbols and organize findings in the Markup Table. • Export or share the finished PDF. Your documents remain in the locations you choose in Files. PolyPDF supports an optional Pro purchase for advanced tools; the app shows which features require Pro before purchase. PolyPDF is also available on Mac. Visit polypdf.com for details and support.
Subtext
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Have you ever stared at a message and wondered, "What are they really trying to say?" Or struggled to find the perfect response that strikes the right balance between polite and assertive? Meet Subtext, your ultimate AI-powered communication assistant that reads between the lines for you! Subtext is an innovative translation app that doesn't translate languages—it translates intentions. By leveraging a cutting-edge Large Language Model (LLM), Subtext analyzes the underlying subtext of any message and provides you with the true meaning behind the words. Even better, it offers tailored reply suggestions to fit your exact goal. Key Features: Deep Subtext Analysis Simply paste a confusing or passive-aggressive message into the app. Subtext will instantly break down the sender's true intentions, emotional state, and hidden agenda. Never be left guessing again! Multi-Style Reply Generator Need to reply but don't know how? Choose your goal! Whether you want to show high EQ, politely decline, flirt back, or confidently stand your ground, Subtext generates multiple reply options for you to copy with just one tap. 100% Offline & Absolute Privacy This is our biggest breakthrough! Subtext downloads and runs an optimized Large Language Model directly on your iPhone's Neural Engine. No Internet Required: Analyze messages anywhere, anytime, even on airplane mode. Zero Data Tracking: Your private conversations never leave your device. We do not upload your chats to any cloud servers. Your secrets remain strictly yours. Adaptive Multi-Language Output Whether the original message is in English, Spanish, Japanese, or Chinese, Subtext adapts to your device's native language to provide culturally relevant analysis and flawless replies. Stop overthinking your chats. Let Subtext be your secret weapon for flawless communication. Download now and take control of every conversation! (Note: The app requires downloading a local LLM file upon first launch for the offline features to work.)
Screenshots
Verdict
The clearest difference is update cadence: PolyPDF at every 3 weeks against Subtext's every 3 months. PolyPDF also leads on device support (3 vs 1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PolyPDF ships an update every 3 weeks, Subtext every 3 months. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.
| Parameter | PolyPDF | Subtext |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 57 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Euclidean Software LLC | Yue Pu |
In-app purchases
PolyPDF
No in-app purchases
Subtext
No in-app purchases









