# InversionLetter vs YOAKE SPACE

The clearest difference is review sentiment: YOAKE SPACE at 50% against InversionLetter's 15%. YOAKE SPACE also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 17 months). InversionLetter's advantage is iOS requirement (10.3 vs 16.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

InversionLetter ships an update every 17 months, YOAKE SPACE every 2 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | InversionLetter | YOAKE SPACE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/inversionletter/id970949034/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 15.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 17 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 26 MB | 36 MB |
| Requires iOS | **10.3** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [EIICHI KOMINE](https://appshunter.io/developer/495643581) | [株式会社YOAKE entertainment](https://appshunter.io/developer/1861273970) |

## What reviewers say

### InversionLetter

[App page](https://appshunter.io/ios/app/inversionletter/id970949034)

This app allows users to invert and rotate text messages, then send them as images via email. It offers options to change characters, tilt, and invert text, with various font choices.

**Highlights:** Invert characters, Rotate text, Send as image via email, Change characters, Tilt and invert options, Font selection

**Features:** Vision Pro support

**In-app purchases:** none


### YOAKE SPACE

[App page](https://appshunter.io/ios/app/yoake-space/id6756539642)

Enhance your idol support experience with a fan community app. Track your support through AI analysis, earn scores to unlock exclusive benefits like early ticket access, and stay updated on community trends. Connect your social media to boost your idol's visibility.

**Highlights:** AI SNS Trend analysis, Membership ranks and exclusive benefits, Early event ticket access, Community trend updates, View all IRC lineups, Connect X (Twitter) account

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

**In-app purchases:** none


## Frequently asked questions

### Is InversionLetter free?

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

### Is YOAKE SPACE free?

YOAKE SPACE is free to download, with no in-app purchases.

### Do InversionLetter or YOAKE SPACE have ads?

InversionLetter shows ads; YOAKE SPACE does not.

### Which is updated more often, InversionLetter or YOAKE SPACE?

InversionLetter ships an update every 17 months, and YOAKE SPACE every 2 weeks. Most recently, InversionLetter was updated on November 1, 2026 and YOAKE SPACE on October 30, 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.*