# Upofrequency vs DuoCards

The clearest difference is review sentiment: DuoCards at 63% against Upofrequency's 0%. DuoCards also leads on update cadence (monthly vs every 7 months). Upofrequency's advantage is in-app purchases (none vs 11) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month. Upofrequency asks for nothing beyond the download.

Upofrequency ships an update every 7 months, DuoCards monthly. The most recent releases landed on October 9, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Upofrequency | DuoCards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1.4K ratings)](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917/reviews)** |
| Number of ratings | — | **1.4K** |
| Positive reviews | 0.0% of reviews | **63.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 19 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Easystaff S.r.l.](https://appshunter.io/developer/1170587182) | [DuoCards s.r.o](https://appshunter.io/developer/1508159916) |

## What reviewers say

### Upofrequency

[App page](https://appshunter.io/ios/app/upofrequency/id1499832655)

This app provides students and faculty of the University of Piemonte Orientale with comprehensive information on class schedules, lecture details, and room availability. It also offers real-time attendance tracking and push notifications for important announcements.

**Highlights:** Course and degree program configuration, Weekly and semester class schedules, Detailed lecture information, Real-time classroom availability, Push notifications for announcements, Attendance tracking for mandatory courses

**Features:** macOS Compatibility

**In-app purchases:** none


### DuoCards

[App page](https://appshunter.io/ios/app/duocards-vocabulary-builder/id1508159917)

Master a new language with interactive flashcards and video courses. This app helps you build vocabulary, guess words, and track your progress across over 50 languages. Learn effectively through spaced repetition and integrated translation tools.

**Highlights:** Flashcard learning with spaced repetition, Video language courses with interactive subtitles, Integrated translator for over 50 languages, Vocabulary builder and progress tracker, Guess words and phrases to sharpen skills, Read foreign language articles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DuoCards Premium | $19.99 | per month |
| DuoCards Plus | $33.00 | per 3 months |
| DuoCards Premium | $34.99 | per 3 months |
| DuoCards Premium | $49.99 | per year |
| DuoCards Premium | $64.90 | per year |
| DuoCards Premium | $67.99 | per year |
| DuoCards Premium | $107.99 | per year |
| DuoCards Premium | $109.00 | per year |
| DuoCards Premium | $113.99 | per year |
| DuoCards Premium | $162.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 💡 Customizable flashcards
- 🚀 Efficient learning algorithm
- 🐘 Cute mascot (Memo the mammoth)

**What reviewers complain about**

- 🐛 Bugs and crashes
- ⚠️ Unreliable server connection
- 💰 Expensive subscription
- 🤔 Confusing interface

**Reported bugs**

- App freezes and crashes
- Issues with logging in and accessing content
- Inconsistent behavior when adding new words
- Problems with video playback and subtitles

**Requested features**

- Offline mode
- More customization options
- Improved spaced repetition system
- Better integration with other language learning tools


## Frequently asked questions

### Is Upofrequency free?

Upofrequency is free to download, with no in-app purchases.

### Is DuoCards free?

DuoCards is free to download, with in-app purchases available.

### Do Upofrequency or DuoCards have ads?

DuoCards shows ads; Upofrequency does not.

### Which is updated more often, Upofrequency or DuoCards?

Upofrequency ships an update every 7 months, and DuoCards monthly. Most recently, Upofrequency was updated on October 9, 2026 and DuoCards on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*