# iDuas vs Flash Study Smart Flashcards

The clearest difference is in-app purchases: iDuas at none against Flash Study Smart Flashcards's 1. iDuas also leads on device support (3 vs 1) and iOS requirement (10.0 vs 18.6). Flash Study Smart Flashcards's advantage is update cadence (daily vs every 18 months). On price, review sentiment and ads there is nothing between them.

Both are free to download. Flash Study Smart Flashcards sells 1 one-off in-app purchase. iDuas asks for nothing beyond the download.

iDuas ships an update every 18 months, Flash Study Smart Flashcards daily. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | iDuas | Flash Study Smart Flashcards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/iduas-rajabshabaan/id1220875018/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 4 MB |
| Requires iOS | **10.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ECNET SOLUTIONS INC.](https://appshunter.io/developer/320171762) | [Tanveer Dhaliwal](https://appshunter.io/developer/1885877614) |

## What reviewers say

### iDuas

[App page](https://appshunter.io/ios/app/iduas-rajabshabaan/id1220875018)

This app provides daily rituals, supplications, and important events for the months of Rajab and Shabaan, leading up to Ramadhan. It includes multimedia content, customizable views, and specific Du'as for spiritual observance.

**Highlights:** Daily rituals and supplications, Important events for Rajab and Shabaan, Multimedia content (MP3s and video), Customizable interface and font sizing, Line-by-line or full Du'a view, Transliteration support, Bookmarking and sharing options

**Features:** macOS Compatibility

**In-app purchases:** none


### Flash Study Smart Flashcards

[App page](https://appshunter.io/ios/app/flash-study-smart-flashcards/id6760717160)

This app uses adaptive spaced repetition to predict when you'll forget information and schedules reviews at the optimal time. It helps you study more efficiently by focusing on what you're about to forget, strengthening your memory and improving retention.

**Highlights:** Adaptive spaced repetition (FSRS), Smart flashcard creation and review, Automated scheduling based on memory, Progress tracking and performance monitoring, Study library organization, Streak and achievement system

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flash Study Pro | $4.99 | one-time |


## Frequently asked questions

### Is iDuas free?

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

### Is Flash Study Smart Flashcards free?

Flash Study Smart Flashcards is free to download, with in-app purchases available.

### Do iDuas or Flash Study Smart Flashcards have ads?

Neither iDuas nor Flash Study Smart Flashcards shows ads.

### Which is updated more often, iDuas or Flash Study Smart Flashcards?

iDuas ships an update every 18 months, and Flash Study Smart Flashcards daily. Most recently, iDuas was updated on October 12, 2026 and Flash Study Smart Flashcards on October 10, 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.*