# Delta单词 vs Recall

The clearest difference is in-app purchases: Delta单词 at none against Recall's 1. Delta单词 also leads on update cadence (daily vs weekly) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Recall sells 1 one-off in-app purchase. Delta单词 asks for nothing beyond the download.

Delta单词 ships an update daily, Recall weekly. The most recent releases landed on September 8, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | Delta单词 | Recall |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 180 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [田丰 何](https://appshunter.io/developer/1674464316) | [AU ALLGO PTY LTD](https://appshunter.io/developer/1773620373) |

## What reviewers say

### Delta单词

[App page](https://appshunter.io/ios/app/delta/id6744654342)

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

**In-app purchases:** none


### Recall

[App page](https://appshunter.io/ios/app/recall-flashcard-and-study-app/id6759892918)

This app uses an advanced spaced repetition algorithm to help you study more effectively. It schedules reviews precisely when you're about to forget, offers a visually engaging review experience, and supports importing and exporting flashcards from various file formats.

**Highlights:** FSRS-5 spaced repetition algorithm, Intuitive card review with animations, Home screen widget for quick access, Import/export flashcards from files, Study streak tracking and reminders, iCloud sync across devices, Mastery tracking and progress visualization

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Recall Premium | $2.99 | one-time |


## Frequently asked questions

### Is Delta单词 free?

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

### Is Recall free?

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

### Do Delta单词 or Recall have ads?

Neither Delta单词 nor Recall shows ads.

### Which is updated more often, Delta单词 or Recall?

Delta单词 ships an update daily, and Recall weekly. Most recently, Delta单词 was updated on September 8, 2026 and Recall on August 20, 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.*