# IDIY vs MR認定試験対策

The clearest difference is price: IDIY at Free against MR認定試験対策's $4.99. IDIY also leads on update cadence (fortnightly vs every 2 months). MR認定試験対策's advantage is in-app purchases (none vs 16). On ads, device support and iOS requirement there is nothing between them.

IDIY is free to download; MR認定試験対策 costs $4.99 up front. IDIY sells 16 one-off in-app purchases. MR認定試験対策 asks for nothing beyond the download.

IDIY ships an update fortnightly, MR認定試験対策 every 2 months. The most recent releases landed on October 16, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | IDIY | MR認定試験対策 |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | 48.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 70 MB | 34 MB |
| Requires iOS | 16 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ROUTINGSYSTEMS. INC](https://appshunter.io/developer/1149802102) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### IDIY

[App page](https://appshunter.io/ios/app/idiy/id1363811179)

Receive personalized English writing feedback from instructors worldwide. Improve your writing skills through daily prompts, custom submissions, and interactive messaging. Access free online English courses to supplement your learning.

**Highlights:** Personalized English writing feedback, Daily writing prompts, Upload your own English texts, Instructor messaging, Free online English courses, Progress tracking, Native and bilingual instructors

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CEFR A2レベル単語帳 | $4.99 | one-time |
| CEFR B2レベル単語帳 | $4.99 | one-time |
| CEFR C1レベル単語帳 | $4.99 | one-time |
| CEFR B1レベル単語帳 | $4.99 | one-time |
| CEFR A1レベル単語帳 | $4.99 | one-time |
| CEFR C2レベル単語帳 | $4.99 | one-time |
| 500ポイント | $39.99 | one-time |
| 700ポイント | $59.99 | one-time |
| 1000ポイント | $69.99 | one-time |
| 学べるプランライト50単語 3ヶ月 | $149.99 | one-time |
| 2000ポイント | $149.99 | one-time |
| 学べるプランスタンダードプラス50単語 3ヶ月 | $229.99 | one-time |
| 学べるプランライト100単語 3ヶ月 | $299.99 | one-time |
| 学べるプランスタンダードプラス100単語 3ヶ月 | $349.99 | one-time |
| 学べるプランライト200単語 3ヶ月 | $599.99 | one-time |
| 学べるプランスタンダードプラス200単語 3ヶ月 | $699.99 | one-time |


### MR認定試験対策

[App page](https://appshunter.io/ios/app/mr/id6780413001)

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

**In-app purchases:** none


## Frequently asked questions

### Is IDIY free?

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

### Is MR認定試験対策 free?

MR認定試験対策 costs $4.99, with no in-app purchases.

### Do IDIY or MR認定試験対策 have ads?

Neither IDIY nor MR認定試験対策 shows ads.

### Which is updated more often, IDIY or MR認定試験対策?

IDIY ships an update fortnightly, and MR認定試験対策 every 2 months. Most recently, IDIY was updated on October 16, 2026 and MR認定試験対策 on September 30, 2026.

---

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