InversionLetter vs グラプリ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
InversionLetter
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.
- Invert characters
- Rotate text
- Send as image via email
- Change characters
- Tilt and invert options
- Font selection
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You can invert the entered characters , and can rotate. You can send by e-mail as an image . [ Operation ] Q: I want to change the previously entered characters A: Select the character you want change, you can change at each button . ( Tilt and inversion , fonts can be changed )
グラプリ
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グラプリとはGrand Prixつまり特別賞の文字をとった、アイドル•モデル•コンテスタント達(ポスター)の夢をファンの方々の応援によって特別賞を決める動画投稿配信アプリです。 グラプリではポスターの夢を応援するために動画投稿内でのコメントでポスターとファン(サポーター)がコミュニケーションをとることができます。 あなたの応援で推しの夢が叶う？！ ポスターの夢を応援するサポーターになりませんか？ グラプリの遊び方 •様々な年代のポスターがテーマに沿った動画を投稿しているので、お気に入りのポスターを見つけコメントしてコミュニケーションをとろう •お気に入りのポスターを応援してポスターの夢を叶えよう グラプリのprize 大型駅看板の掲載や賞金、テレビ出演や雑誌の掲載様々なprizeを多数用意
Screenshots
Verdict
The clearest difference is review sentiment: グラプリ at 50% against InversionLetter's 15%. グラプリ also leads on ads (none vs shown) and update cadence (monthly vs every 17 months). InversionLetter's advantage is in-app purchases (none vs 8) and iOS requirement (10.3 vs 13.0). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. グラプリ sells 8 one-off in-app purchases. InversionLetter asks for nothing beyond the download.
InversionLetter ships an update every 17 months, グラプリ monthly. The most recent releases landed on October 13, 2026 and September 22, 2026 respectively.
| Parameter | InversionLetter | グラプリ |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 15.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 17 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 10.3 — better | 13.0 |
| Further details — not scored | ||
| Size | 26 MB | 53 MB |
| Age rating | 4+ | 12+ |
| Developer | EIICHI KOMINE | OTA |
Customer experience
InversionLetter
グラプリ
In-app purchases
InversionLetter
No in-app purchases
グラプリ
- 130 コイン$0.99
- 420 コイン$2.99
- 900 コイン$5.99
Show 5 moreShow fewer
- 4,400 コイン$29.99
- 9,000 コイン$59.99
- 18,500 コイン$119.99
- 48,000 コイン$299.99
- 48,800 コイン$299.99
