# IDIY vs スピフル

The clearest difference is review sentiment: IDIY at 49% against スピフル's 0%. IDIY also leads on device support (3 vs 1). スピフル's advantage is in-app purchases (none vs 16). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. IDIY sells 16 one-off in-app purchases. スピフル asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | IDIY | スピフル |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (33 ratings)](https://appshunter.io/ios/app/id6504902019/reviews)** |
| Number of ratings | — | **33** |
| Positive reviews | **48.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 70 MB | 48 MB |
| Requires iOS | 16 | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ROUTINGSYSTEMS. INC](https://appshunter.io/developer/1149802102) | [PROGRIT Inc.](https://appshunter.io/developer/1437876016) |

## 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 |


### スピフル

[App page](https://appshunter.io/ios/app/id6504902019)

This app enhances English speaking skills through AI-powered oral composition and monologue training. It offers personalized feedback and practical business scenarios to improve fluency and expression, building on proven methodologies.

**Highlights:** AI scoring and feedback, Oral composition training, Monologue English conversation practice, Real-time発話 speed measurement, Extensive business例文 library, AI speech correction

**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 スピフル free?

スピフル is free to download, with no in-app purchases.

### Do IDIY or スピフル have ads?

Neither IDIY nor スピフル shows ads.

### Which is updated more often, IDIY or スピフル?

IDIY ships an update fortnightly, and スピフル fortnightly. Most recently, IDIY was updated on September 19, 2026 and スピフル on September 24, 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.*