# できたカレンダー vs Blitz

The clearest difference is in-app purchases: できたカレンダー at none against Blitz's 1. Blitz's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Blitz sells 1 one-off in-app purchase. できたカレンダー asks for nothing beyond the download.

できたカレンダー ships an update every 8 days, Blitz every 5 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | できたカレンダー | Blitz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blitz/id6761144471/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 164 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hibiki Tsuboi](https://appshunter.io/developer/1562276995) | [Kazuyuki SASABE](https://appshunter.io/developer/1888017423) |

## What reviewers say

### できたカレンダー

[App page](https://appshunter.io/ios/app/id6755370736)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 できたカレンダー free?

できたカレンダー is free to download, with no in-app purchases.

### Is Blitz free?

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

### Do できたカレンダー or Blitz have ads?

Neither できたカレンダー nor Blitz shows ads.

### Which is updated more often, できたカレンダー or Blitz?

できたカレンダー ships an update every 8 days, and Blitz every 5 days. Most recently, できたカレンダー 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.*