# OtoFlash vs Blitz

The clearest difference is iOS requirement: OtoFlash at 15.5 against Blitz's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. OtoFlash sells 2 in-app purchases, starting at $3.99 per month and Blitz sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

OtoFlash ships an update weekly, Blitz every 5 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OtoFlash | Blitz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blitz/id6761144471/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 80 MB | 164 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Koji Minoda](https://appshunter.io/developer/1790413869) | [Kazuyuki SASABE](https://appshunter.io/developer/1888017423) |

## What reviewers say

### OtoFlash

[App page](https://appshunter.io/ios/app/otoflash-ai-audio-flashcard/id6740526880)

Master languages with AI-powered audio flashcards. Learn pronunciation with natural, native-sounding voices and create study materials by scanning images. Track progress with study streaks and engage in multiple learning modes for effective retention.

**Highlights:** AI-generated native pronunciation, Image scanning for flashcard creation, Audio streaming for immersive learning, Study streaks for motivation, Multiple study modes, Support for 25+ languages

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $3.99 | per month |
| 6 Months Premium | $14.99 | per 6 months |


### Blitz

[App page](https://appshunter.io/ios/app/blitz/id6761144471)

This app transforms the challenge of memorizing English sentences and spontaneous sentence creation into an enjoyable experience. It offers diverse learning methods, AI-powered speech correction, and personalized content creation to help users improve their English speaking and writing skills.

**Highlights:** Diverse learning methods, AI speech correction and feedback, Personalized lesson creation, Progress tracking and statistics, Offline learning options, Cloud data synchronization

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1,600 AIポイント | $2.99 | one-time |


## Frequently asked questions

### Is OtoFlash free?

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

### Is Blitz free?

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

### Do OtoFlash or Blitz have ads?

Neither OtoFlash nor Blitz shows ads.

### Which is updated more often, OtoFlash or Blitz?

OtoFlash ships an update weekly, and Blitz every 5 days. Most recently, OtoFlash was updated on October 30, 2026 and Blitz on November 5, 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.*