Roma vs Sum + Sum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Roma
Learn Roman alphabet (Romaji) for Japanese communication through interactive games. Choose between card matching or keyboard input modes, and practice with single characters or full words to defeat the Robo.
- Learn Romaji for Japanese communication
- Card matching mode
- Keyboard input mode
- Practice single characters (Letter)
- Practice multiple characters (Word)
- Beat the Robo game mechanic
- Uses Hepburn system
Read full descriptionHide full description
Beat the Robo with Roma-ji(Roman alphabet). Let's learn Roma-ji to communicate with Japanese people! With this app, you can learn Roma-ji with using short words. There are two play modes. In 'Card' mode, choose an answer card which has the right roma-ji the Robo asked. In 'Keyboard' mode, input alphabets and make a correct answer by your own! In each mode , you can choose the question style. One is "Letter"(one hiragana character), the other is "Word"(more than one hiragana character). You correct, lose robo's power. Now, it's time to beat the Robo! ----- This app uses Hepburn system. -----
Sum + Sum
Read full descriptionHide full description
Sum Tass Sum(さんたさん)は、足し算の筆算をマス目で一歩ずつ練習できる学習アプリです。 入力するマスが自動で選ばれ、関係する数字がハイライトされるため、子どもが「次にどこを考えればよいか」を見失いにくい設計です。繰り上がりがある問題も、補助マスを使って順番に確認しながら進められます。 練習できる内容: ・1桁+1桁 ・2桁+1桁 ・2桁+2桁 ・3桁+3桁 ・3つの数の足し算 特徴: ・筆算をマス目で表示 ・入力対象マスを自動ガイド ・関連する数字をハイライト ・繰り上がりもステップごとに練習 ・ヒントとヘルプ機能 ・間違えた問題の復習 ・学習履歴を端末内に保存 ・iPhone / iPad対応 Sum Tass Sumは、家庭での算数学習や、足し算の筆算をはじめて練習する子ども向けに作られています。 問題を解くだけでなく、筆算の手順そのものを自然に身につけられることを目指しています。
Screenshots
Verdict
The clearest difference is ads: Sum + Sum at none against Roma's shown. On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Roma | Sum + Sum |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| Update frequency | Every 3 months | — |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 68 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | MASAHIRO MIZUTANI | Yu Takahashi |
In-app purchases
Roma
No in-app purchases
Sum + Sum
No in-app purchases









