Intelli Flashcards vs Spacify
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Intelli Flashcards
Create and review custom flashcards using a spaced repetition system to improve long-term memory retention. Supports importing CSV files and adding images to cards for a more visual learning experience.
- Custom flashcard creation
- Spaced Repetition System (SRS)
- CSV import for flashcards
- Image support for flashcards
- Sebastian Leitner's algorithm
- Offline functionality
Read full descriptionHide full description
Thousands of users love Intelli Flashcards for its simplicity, effectiveness and elegance. But first things first. This app is not free, as the value you get using it properly is enormous. I also don’t want you to do a blind bargain by making this app a paid one. So here is the deal: download it for free, try it with the only limitation of 50 flashcards, and if you love it, support the project by making an in-app purchase. You add flashcards on your own, with vocabs or information you want to remember. Alternatively, you can import a 2-column CSV file with vocabs, if you have one. The app is built around Spaced Repetition technique, which is not the best to learn new information (yes, I was wrong believing that initially), but the best to keep the information you’ve learnt. However, you can also learn with flashcards if you have a good visual memory. The best combination: learn new information by building up the associations and move that information to long-time memory by repeating it with flashcards. Under the hood you will find Sebastian Leitner’s algorithm which basically has two simple rules: if you remember what’s on the back side of the card, the repeating interval is doubled (1-2-4-8-16 days and so on). If you forget the back side, start all over again with daily repeating. Intelli Flashcards was designed to be used every day by someone, who learns foreign language. I’m aware of the fact, that average user would add 1500+ flashcards on his learning path. He might be outdoors and in a rush, so the process of creating a new flashcard is 0 clicks away - it’s right on the main screen! The repeating session is just 1 click away. After a year of testing the spaced repetition algorithm, Derek Sivers (entrepreneur, programmer, founder of CD Baby and just a great person) stated that it was the most helpful learning technique he has tried for 14 years. To read more about Derek’s experiment, visit www.sivers.org/srs From developer: after finishing working on Intelli, I started to use it to learn Spanish just to test the effectiveness of this algorithm. Intelli is not the only tool I’ve used, but it had the biggest impact on the learning speed and effectivity. I went from 0 to C1 level in Spanish in just 1 year, spending in average 15-20 minutes on learning every day. To read about other tools I’ve used to learn Spanish, go to www.boweidmann.com/language-learning But then I’ve stumbled upon a great article about language learning, written by Tim Ferriss, the best-selling author and self-experimenter: http://fourhourworkweek.com/2014/07/16/how-to-learn-any-language-in-record-time-and-never-forget-it/ Inspired by that article, I’ve worked on the possibility of adding images directly to flashcards. Version 3.0 was born. Thank you, Tim! That function has enhanced the experience the users have got with the app. And it’s much more interesting to recall a vocab looking on image. That’s how Rosetta Stone works. That’s how we recall our native vocabs. Maybe I should start a new language just to test this technique with images. ;) User experience is one of the keywords this app is built around. So your opinion on that is very important to me. You can contact me personally out of the app and receive my response as soon as possible. When I develop a new version of the app, I make sure new functionality does not affect the original user experience. However, it’s hard to predict the way you are going to make use of it. So if there is some unexpected behavior of the app, feel free to tell me about it. And when somewhere in the future you realize, Intelli has supported you a lot on your path of learning, I’d love your short review in AppStore.
Spacify
This app helps you retain information by creating smart flashcards. It uses a scientifically proven spaced repetition algorithm to optimize memorization and offers a minimalist design to minimize distractions. Learn and remember anything, from vocabulary to complex facts, with this efficient study tool.
- Create smart flashcards
- Spaced Repetition algorithm
- iCloud sync & backup
- Minimalist design
- Rich text editor
- Offline and online functionality
Read full descriptionHide full description
Spacify turns study time into memories that stick — whether you're learning vocabulary, historical dates, law paragraphs, medical definitions, or formulas. Highlights: • Adaptive spaced repetition, built on decades of memory research — 30% fewer reviews for the same recall • Fill-in-the-blanks cards: hide any word, image, or formula — each blank is reviewed on its own schedule • Home Screen widgets show your due cards and streak at a glance • Daily-digest reminders • LaTeX formula rendering for beautifully typeset math, chemistry and equations • Insert pictures from your camera or photo library • Tags for topic-specific reviewing (Pro) • Already have cards in Google Sheets? Paste the link, study in seconds • iCloud sync & backup across all your devices • Rich text editor, Dark Mode, works offline and online • No limits on number of cards you can create Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: Intelli Flashcards at 11.0 against Spacify's 18.0. On price, review sentiment, update cadence and 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
Both are free to download. Intelli Flashcards sells 1 one-off in-app purchase and Spacify sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 30, 2026 and September 23, 2026 respectively.
| Parameter | Intelli Flashcards | Spacify |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (21 ratings) — better | — |
| Positive reviews | 84.6% of reviews | 85.7% of reviews — better |
| Number of ratings | 21 — better | — |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 15 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Bogdan Weidmann | Denis Semenov |
Customer experience
Intelli Flashcards
Spacify
In-app purchases
Intelli Flashcards
- Full Version$3.99
Spacify
- Monthly Subscription$2.991 Month
- 3 Months Subscription$2.993 Months
- Annual Subscription14 Days trial$19.991 Year
Questions
Is Intelli Flashcards free?
Is Spacify free?
Do Intelli Flashcards or Spacify have ads?
Which is updated more often, Intelli Flashcards or Spacify?
Other comparisons















