constant. vs Deckbase
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
constant.
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constant. makes studying effortless. Upload your notes, textbooks, slides, or PDFs and let AI instantly generate questions for you. No more wasting time creating flashcards - just start learning. - Instant question decks from your own material - Interactive "Ask Camel" AI Chat to explain answers and follow-up questions - Spaced repetition to boost memory and recall - Search and share public decks - Study smarter, not longer With constant., you focus on learning - AI handles the prep.
Deckbase
This AI-powered study assistant generates flashcards from various file types and chat inputs. It utilizes spaced repetition for effective long-term memory retention and offers AI-generated images and audio for enhanced learning.
- AI chat assistant for instant flashcard generation
- AI image and audio generation for mnemonic aids
- Bulk flashcard creation from documents and files
- OCR for generating cards from photos and scans
- Spaced repetition for memory retention
- Clean and focused study interface
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Deckbase is your AI study assistant. Ask in chat or upload files to generate flashcards in bulk, then review with spaced repetition so you remember what matters long-term. Why Deckbase: - AI chat assistant Ask questions in chat and get flashcards generated instantly. - AI image & audio generation Auto-generate mnemonic images and pronunciation audio for every card. - Bulk AI card generation from your materials Turn PDFs, notes, images, DOCX, Excel, CSV, and .apkg into first-draft flashcards in seconds. - OCR flashcards from photos and scans Capture text from images and turn it into cards without typing. - Spaced repetition workflow Review at the right time to reduce forgetting and improve retention. - Clean study experience Focused interface built for repeatable daily review. - Flexible study workflow Generate, edit, and review cards quickly in a focused mobile experience. - Flexible for many learners Useful for exam prep, medical study, language vocabulary, and professional learning. How it works: 1. Add files (PDF, notes, images, DOCX, Excel, CSV, or .apkg) or start with chat 2. Generate AI flashcards in bulk 3. Edit and organize with templates 4. Review with spaced repetition Legal: Privacy Policy: https://www.deckbase.co/privacy-policy Terms and Conditions: https://www.deckbase.co/terms-and-conditions
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Verdict
The clearest difference is in-app purchases: constant. at none against Deckbase's 4. constant. also leads on ads (none vs shown). 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
Both are free to download. Deckbase sells 4 in-app purchases, starting at $5.99 per month. constant. asks for nothing beyond the download.
constant. ships an update every 3 days, Deckbase every 4 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.
| Parameter | constant. | Deckbase |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (3 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 3 days — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | Chun-Huei Liu | Yosuke Sakurai |
In-app purchases
constant.
No in-app purchases
Deckbase
- Basic Month7 Days trial$5.991 Month
- Pro Month7 Days trial$11.991 Month
- Basic Year7 Days trial$59.001 Year
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- Pro Year7 Days trial$119.001 Year
