PDF Aide vs Keyda
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Aide
Streamline your document management with this comprehensive PDF tool. Convert images, Office files, and web pages to PDF, or export PDFs to editable formats. Edit, annotate, merge, split, and secure your documents with ease.
- Convert images, Office files, and web pages to PDF
- Export PDFs to editable formats
- Annotate and draw on documents
- Merge and split PDF files
- Compress PDF file size
- Password protect sensitive documents
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PDF Aide: Revolutionizing Your Document Workflow with Professional Editing and Conversion! Tired of constantly switching between multiple apps to process documents? PDF Aide is your best choice—the most comprehensive and user-friendly PDF processing tool designed specifically for iPhone. Whether you're a student, business professional, or working remotely, our all-in-one toolkit helps you convert, edit, sign, and manage documents in seconds. Powerful conversion tools can convert virtually anything to high-quality PDFs or export PDFs to editable formats: • Image to PDF: Instantly convert photos, scans, and gallery images. • Office Conversion Suite: Seamlessly convert Word, Excel, and PowerPoint documents to PDF. • Web to PDF: Save any webpage as a PDF for offline reading and archiving. • Text and More: Convert plain text and other document types with a single click. Advanced editing and annotation: More than just viewing PDFs, take control of them: • Annotations: Add annotations and draw directly on documents. • Merge and Split: Merge multiple files into a single PDF or extract specific pages into a new document. • Compression: Reduce file size for easy sharing via email or chat tools without loss of quality. Security and Organization: Your privacy and file organization are our top priorities: • Password Protection: Protect sensitive information using advanced encryption technology. • Search: Easily and quickly find the content you need in long documents. Why choose PDF Aide? • High Fidelity: Preserves original fonts, layout, and formatting during conversion. • Privacy First: We handle your documents securely—your data is safe. • User-Friendly: A clean and intuitive interface designed to maximize your productivity Subscriptions & Privacy: Payment will be charged to your iTunes Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage your subscriptions in your App Store Account Settings. Privacy Policy: https://pdf.kestrelcybers.com/privacy-policy.html Terms of Use (EULA): https://pdf.kestrelcybers.com/user-agreement.html Contact Us: For any inquiries or support, please contact us at: pdfaide.ios@outlook.com
Keyda
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Keyda — The AI Keyboard That Thinks With You Write smarter, speak to type, and create images — without ever leaving the app you're in. Keyda is an AI-powered keyboard that works everywhere you type on iPhone and iPad. Whether you're on WhatsApp, replying to email, posting to social, taking notes or filling a form, Keyda brings AI, your voice and an image studio directly into your keyboard. Most AI tools make you leave your app: open a chatbot, copy, paste, generate, switch back. Keyda removes that. Fixing a sentence that used to take seven steps and nearly a minute takes three — and you stay exactly where you are. IMAGE STUDIO — NEW Describe a picture and Keyda draws it. A watercolour of a rainy street, a logo concept, a birthday card, a product mockup — ready in seconds, in whatever shape you need. • Start from your own photo and have Keyda build on it • Your description is expanded into a fuller prompt automatically, so the result matches what you meant • Every image is saved to your account and waiting on your other devices • Lite includes 25 images a month, Pro includes 50, the free trial includes 5 TALK TO TYPE — VOICE TYPING & VOICE ASSISTANT Tap the mic and speak. It's a full assistant, not just dictation: • Speak to type in any app • Change settings by voice — "switch to dark mode," "turn off haptics" • Pull up a saved note — "paste my meeting notes" • Create reminders and notes hands-free • Ask the AI out loud — "write a polite reply declining this invite" Smart self-correction turns "my age is 29, oh sorry, 30" into "30." Dictation is free — no subscription required. SMART ASSIST AI Rewrite for clarity, fix grammar and spelling, shift tone from casual to professional, draft emails and messages, summarise long content, and expand rough notes into finished text — for work, study or everyday chat. A PRODUCTIVITY WORKSPACE IN YOUR KEYBOARD • Notes — ideas, prompts and reminders inside the keyboard • Clipboard History — recent text, links and snippets, one tap away • Translate on Paste — convert content before you send it • Inline Math & Dates — calculate and convert without another app • Conversation Memory — context carries forward, so you never re-explain • Reply in Your Voice — suggestions that sound like you, not a template PRIVATE BY DESIGN Sensitive features are built to keep as much as possible on your device. Voice input is active only while you're recording, transcribed by Apple's Speech Recognition, and never stored by us. Stickers can be generated by a fully offline, on-device model (Lite/Pro, one-time download), or instantly in the cloud if you'd rather skip it. Photos never leave your device unless you attach one yourself. Sign out and every note, clipboard entry, API key and AI memory is wiped immediately. MADE YOURS Nine handcrafted themes — Classic, Midnight, Aurora, Coral, Forest, Ocean, Sunset, Rose and Carbon — sync across the app the moment you switch. However many smart features run in the background, typing stays fast and smooth. Student, professional, creator, freelancer or business owner: Keyda cuts repetitive work every day — better emails, faster replies, instant translation, images on demand, organised notes and clipboard history you can actually find. No app switching. No endless copy-pasting. No interruptions. Just a smarter keyboard that works, listens and draws — everywhere you type. Made in India. Built for everyone.
Screenshots
Verdict
The clearest difference is device support: Keyda at 2 against PDF Aide's —. PDF Aide's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence and in-app purchases 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. PDF Aide sells 2 in-app purchases, starting at $4.99 per month and Keyda sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
PDF Aide ships an update every 3 days, Keyda every 5 days. The most recent releases landed on October 1, 2026 and September 25, 2026 respectively.
| Parameter | PDF Aide | Keyda |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days — better | Every 5 days |
| Ads | — | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | — | iPhone, iPad — better |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 50 MB |
| Age rating | 4+ | 9+ |
| Developer | KESTREL CYBER PTE. LTD. | Nikhil Ryan |
In-app purchases
PDF Aide
- monthly membership7 Days trial$4.991 Month
- Annual Membership$39.991 Year
Keyda
- Lite Keyda — Monthly$1.991 Month
- Pro Keyda — Monthly$4.991 Month
- Pro Keyda — Annual$29.991 Year









