Comparison

Physical Constants vs History Dial

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

Head to head

Physical Constants

Free

📚 Education

★ 3.33 ratingsView app →

About

Physical Constants

Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.

Highlights

Physical constants database
Categorized by topic
Search functionality
Multi-language support
User feedback for corrections

Features

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Application that displays the physical constants. Classified by category, easy to search. Supports all languages in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).

About

History Dial

Features

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[역사를 기억하는 가장 감각적인 방법, 히스토리 다이얼] 연도 암기가 지루하셨나요? 이제 금고를 열듯 다이얼을 돌려 역사의 문을 열어보세요. ■ 주요 기능 손맛이 살아있는 다이얼 입력 지루한 키패드 입력은 그만! 햅틱 반응과 사운드가 결합된 4자리 다이얼 UI로, 게임하듯 즐겁게 연도를 맞출 수 있습니다. 선사 시대부터 현대까지, 세계사의 주요 사건들을 엄선했습니다. Class S부터 Class C까지 역사적 사건의 중요도에 따라 나뉘어집니다. 나만의 역사 아카이브 (Timeline) 문제를 맞힐 때마다 아카이브에 카드가 수집됩니다. 텅 비어있던 연표를 당신의 지식으로 채워나가세요. 강력한 학습 보조 '오답 노트' & '인쇄' 틀린 문제는 'Missed Intel(오답 노트)'에 자동으로 저장됩니다. [핵심 기능] 앱 내의 프린터 버튼을 눌러보세요. 오답 목록과 수집한 연표를 A4 용지에 깔끔하게 인쇄하여 진짜 시험공부에 활용할 수 있습니다. 100% 오프라인 & 프라이버시 보호 비행기 안에서도, 와이파이가 없어도 실행됩니다. 회원가입? 로그인? 없습니다. 모든 데이터는 당신의 핸드폰에만 안전하게 저장됩니다. ■ 개발자의 한마디 "역사 공부를 어려워하는 아이들과 학생들을 위해, 어떻게 하면 연도를 더 재미있게 외울 수 있을까 고민하다 만들었습니다. 이 앱이 여러분의 역사 여행에 즐거운 나침반이 되기를 바랍니다."

Screenshots

Physical Constants2 screens

History Dial4 screens

Verdict

The call

The clearest difference is ads: History Dial at none against Physical Constants's shown. History Dial also leads on update cadence (every 3 days vs every 9 months). Physical Constants's advantage is iOS requirement (12.0 vs 15.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Physical Constants ships an update every 9 months, History Dial every 3 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level

Physical Constants versus History Dial: the parameters behind the verdict, then further details
Parameter	Physical Constants	History Dial
Price	Free	Free
Rating	3.3 (3 ratings) — better	—
Positive reviews	33.3% of reviews	—
Number of ratings	3 — better	—
Update frequency	Every 9 months	Every 3 days — better
Ads	Yes	No — better
In-app purchases	No	No
Monetization	Ad-supported	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	12.0 — better	15.6
Further details — not scored
Size	25 MB	3 MB
Age rating	4+	4+
Developer	Takuya Ishikawa	JONGHYUN PARK

In-app purchases

None

Physical Constants

No in-app purchases

None

History Dial

No in-app purchases

Questions

Is Physical Constants free?

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

Is History Dial free?

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

Do Physical Constants or History Dial have ads?

Physical Constants shows ads; History Dial does not.

Which is updated more often, Physical Constants or History Dial?

Physical Constants ships an update every 9 months, and History Dial every 3 days. Most recently, Physical Constants was updated on November 1, 2026 and History Dial on October 31, 2026.