Simple vs Ciii / BELLA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple
This application offers a straightforward tool for converting units and performing calculations. It combines both functions for user convenience, making it ideal for everyday tasks rather than highly specialized professional use.
- Unit conversion
- Calculator functionality
- Combined converter and calculator
- Easy to use interface
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Easy and simple unit conversion calculator. Converter and calculator are mixed for convenience. *This is not for a highly specialized job.
Ciii / BELLA
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Ciii / BELLA（シーバイベラ）の公式アプリです。 【概要】 ■アプリ上から24時間いつでも予約が可能 指名予約にも対応しているので担当スタッフのスケジュールを確認してからの予約が可能です。 ■クーポン お得なクーポンが配信されます。ネット予約時にクーポン利用での予約も可能なので来店時もスムーズに施術頂けます。 ■スタッフが施術したギャラリーを掲載 前もって画像を確認しておけばスムーズなオーダーが可能です。 ■マイページ機能 予約状況の確認やキャンセルがマイページ上から行えます。スタッフの登録が出来るので前もって担当者を登録しておけばマイページからスムーズな指名予約が可能です。
Screenshots
Verdict
The clearest difference is update cadence: Simple at every 6 months against Ciii / BELLA's every 17 months. Simple also leads on iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Simple ships an update every 6 months, Ciii / BELLA every 17 months. The most recent releases landed on October 21, 2026 and October 4, 2026 respectively.
| Parameter | Simple | Ciii / BELLA |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 6 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 32 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | KENTA OKAMURA | shingo kamei |
In-app purchases
Simple
No in-app purchases
Ciii / BELLA
No in-app purchases
