Comparison

KoKoFlash vs Unit Converter · Baro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KoKoFlash

This app helps users communicate visually and audibly in situations where speaking is difficult. It features a bright flashing screen, customizable messages, and an SOS beacon mode. It also includes an emergency contact display and quick launch options.

Highlights
  • High-brightness flashing screen
  • Adjustable flash speed
  • Pre-registered custom messages
  • Emergency contact display
  • SOS beacon mode (Morse code)
  • Quick launch from lock screen
Features
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KoKoFlash(ここフラッシュ)は、声でのコミュニケーションが難しい状況や、周囲へ素早く意思を伝えたい場面のために開発された視覚的シグナルアプリです。 体調不良、パニック、不安、聴覚・発話に関する困難、人混みや騒音の中など、「声では伝えにくい」「説明する余裕がない」と感じる場面は少なくありません。KoKoFlashは、そのような状況で画面表示や光によって周囲へ情報を伝えることを目的としています。 アプリには高輝度の点滅スクリーンを搭載しており、遠くからでも気付きやすい表示を行えます。 点滅速度を設定画面から変更でき、強い点滅が苦手な方や光過敏に配慮が必要な方のために、ゆっくりとした点滅モードも用意しています。設定はトグル操作を中心に構成し、必要な機能を迷わず切り替えられるよう工夫しました。 また、事前に伝えたい内容を登録しておける定型メッセージ機能を搭載しています。 例えば、 ・体調が悪いです ・救急車を呼んでください ・家族へ連絡してください ・耳が聞こえません ・筆談をお願いします など、あらかじめ準備しておくことで、緊急時にも落ち着いて表示できます。 ユーザー自身が自由に内容を作成できるカスタムメッセージ機能を利用できます。 例えば、 ・人工関節です ・発作がおさまるまで待ってください ・薬を服用しています ・この番号へ連絡してください など、一人ひとり異なる事情や支援してほしい内容を事前に登録できます。 緊急時には説明する余裕がなくなることもあります。事前に自分の状況やお願いしたい内容を登録しておくことで、安心して利用できます。 また、緊急連絡先表示機能も搭載しています。ユーザーは任意の電話番号を登録でき、画面上へ大きく表示できます。支援が必要な際に周囲の方が連絡先を確認し、家族や支援者へ迅速に連絡することができます。 日本国内での利用を想定し、110番(警察)や119番(消防・救急)をプリセット。ただし、実際の通報は利用者または周囲の方が行う必要があります。 ビーコンモードでは、iPhone背面のLEDフラッシュライトを使用し、国際的に広く認知されているSOS救難信号(・・・ーーー・・・)をモールス信号の点滅で繰り返し送信します。 声が出せない状況や、より強く周囲へ存在を知らせたい場合の補助機能として利用できます。 また、本アプリでは迅速な起動を重視しています。 アプリ内には、iPhoneのロック画面から素早く起動するための設定チュートリアルを搭載しました。画像付きで手順を案内しており、スワイプやボタン操作に不慣れな方でも設定しやすくなっています。 KoKoFlashは、日常の安心と緊急時の意思表示を支援するためのシンプルなツールです。 「伝えたいのに伝えられない」 そんな場面で、少しでも力になれることを目指しています。

About

Unit Converter · Baro

Features
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■ 평 · 돈 · 근 · 관 — the Korean units the built-in converters leave out. Unit Converter · Baro opens straight onto them, with the everyday metric, imperial, temperature and shoe-size pairs one tap away. Both rows are live: type into either one and the other follows on every keystroke. No equals key, no convert button, no category menu. Cold start to answer is zero taps — the app comes back exactly as you left it, same pair, same digits, same caret. ------------------------------- ● Why these units are hard ------------------------------- • 1 평 = 400/121 m² and 1 자 = 10/33 m have no exact decimal form. Every factor here is an exact fraction, never a rounded decimal, so 84 → m² → 평 comes back as 84, not 83.99999999999999. • 근 means 600 g for meat and 375 g for vegetables, fruit and herbal medicine. Choosing silently makes the answer 60% wrong, so the toggle stays on screen whenever it can change the result. • Shoe sizes are a lookup table, not a ratio. Values outside it say so instead of inventing a number. • Temperature has its own code path, so ℃ and ℉ are never a plain multiplier. Below absolute zero the app says so rather than clamping your input. ------------------------------- ● On the first screen ------------------------------- • A five-slot chip rail — 평 ↔ m², 돈 ↔ g, 근 ↔ g, mm ↔ US, ℃ ↔ ℉ to begin with. A new pair pins itself to the front; tapping a chip already there never reorders it, so muscle memory keeps working. • Two live rows — tap the other one and the caret moves there. No keyboard swap, no mode. • A ⇅ swap that does not drift — it carries the exact value, not the rounded number on screen, so flipping back and forth never moves your digits. • Its own keypad — sixteen keys, painted with the first frame. The system keyboard never appears and the layout never jumps. 00 is there for 1,000 평 and 10,000 g. • Copy — one key puts the result on the clipboard. The app never reads it back. • 평형 for apartments — enter an area and the familiar 평형 label appears with an 전용 / 공급 toggle. Two separate tables, not an invented ratio. ------------------------------- ● The full catalogue, two taps away ------------------------------- 척관법 first — 평 ↔ m², 돈 ↔ g, 냥 ↔ g, 근 ↔ g, 관 ↔ kg, 자 ↔ cm, 치 ↔ cm, 되 ↔ L, 말 ↔ L, 홉 ↔ mL — then area, weight, length, temperature, volume, shoes and speed. Every row previews the answer for the number you already typed, so you see it before choosing. One tap applies the pair, pins it and closes. The list is curated, not exhaustive: a few dozen pairs people actually reach for, instead of a search field. And the info sheet prints every factor in plain text — 1 돈 = 3.75 g, 1 관 = 3.75 kg, 1 평 = 400/121 m², 1 자 = 10/33 m, 1 되 = 1.8039 L, both 근 values, the Mondopoint shoe anchors — so you can check the arithmetic yourself, offline. ------------------------------- ● Private by design, built to be tapped ------------------------------- • Zero network code. Nothing leaves this phone, ever — check it in airplane mode. • No system permissions at all, and no permission prompt anywhere. • No account, no login. Privacy label: Data Not Collected. • Zero analytics, zero telemetry, zero third-party SDKs. No ads, no subscriptions, no in-app purchases. • Every control is at least 64 × 64 pt, body text 24 pt and up, high contrast on AMOLED-friendly black. • Single taps only — no double-taps, no long-press, no swipes, no hidden gestures. • Six languages: English, 한국어, 日本語, Deutsch, Français, العربية (right-to-left included). Deliberately left out: currency and exchange rates (live rates need a network call), cooking cups and spoons (they depend on the ingredient) and 마지기 (too regionally variable to answer honestly). ------------------------------- ● The Baro promise ------------------------------- Unit Converter is part of Baro — lightweight tools that respect your data, your battery, and your time. "The tools you reach for first."

Screenshots

KoKoFlash1 screens
Unit Converter · Baro4 screens

Verdict

The call

The clearest difference is in-app purchases: Unit Converter · Baro at none against KoKoFlash's 1. Unit Converter · Baro also leads on update cadence (every 2 days vs monthly) and iOS requirement (16.0 vs 18.6). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KoKoFlash sells 1 one-off in-app purchase. Unit Converter · Baro asks for nothing beyond the download.

UpkeepUpdate frequency

KoKoFlash ships an update monthly, Unit Converter · Baro every 2 days. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 5 level
KoKoFlash versus Unit Converter · Baro: the parameters behind the verdict, then further details
ParameterKoKoFlashUnit Converter · Baro
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS18.616.0 — better
Further details — not scored
Size8 MB21 MB
Age rating4+4+
Developermasahiko akitaEuiseok Kim

In-app purchases

1 purchases

KoKoFlash

One-time1
  • ここフラッシュ PRO版Free
None

Unit Converter · Baro

No in-app purchases

Questions

Is KoKoFlash free?
KoKoFlash is free to download, with in-app purchases available.
Is Unit Converter · Baro free?
Unit Converter · Baro is free to download, with no in-app purchases.
Do KoKoFlash or Unit Converter · Baro have ads?
Neither KoKoFlash nor Unit Converter · Baro shows ads.
Which is updated more often, KoKoFlash or Unit Converter · Baro?
KoKoFlash ships an update monthly, and Unit Converter · Baro every 2 days. Most recently, KoKoFlash was updated on October 28, 2026 and Unit Converter · Baro on October 26, 2026.

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