Comparison

Gengou vs HachiCalendar2 Pro

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

Head to head
About

Gengou

Quickly convert between Japanese era names and Christian era years. Features include era and year searches, period and era pickers, and the ability to display text in Japanese or English.

Highlights
  • Era and Year Search
  • Period Picker
  • Era Picker
  • Christian Era Year Picker
  • Japanese Era Year Picker
  • Show This Year Button
  • Dual Language Support (JP/EN)
Features
Read full description

"Gengou" is a quick reference of the Japanese era system. This application has functions as below. - Era and Year Search - Period picker - Era picker - Christian era year picker - Japanese era year picker - Show this year button - Texts can be shown in Japanese or English independently of the default language setting. - Application badge can show this year number in the Japanese era or the Christian era. The Japanese era system identifies a year by the combination of the era name (Gengou or Nengou) and the year number within the era. For example, A.D. 2001 is Heisei 13. Please note that two Gengou schemes were used in Parallel from 1331 to 1392 during Nanboku-chō period. This application would be very useful if you are working with the governments, municipal offices and/or certain companies in Japan.

About

HachiCalendar2 Pro

This app combines calendar, to-do lists, and an AI assistant for seamless organization. Manage events as tasks, utilize AI for scheduling, and keep key dates visible with floating countdown cards. It offers detailed time insights and supports multiple calendar systems.

Highlights
  • Infinite vertical scrolling
  • Events as to-dos
  • Integrated AI assistant
  • Floating countdown cards
  • Time insights & analytics
  • Quick voice input
  • Gregorian/Lunar calendar support
Features
Read full description

Your faithful friend, making life more organized. 15 years, over 1 million users. Contact: hachi.iphone@gmail.com Scroll endlessly through your past and future. Turn events into checkable to-dos. AI helps you create and analyze events naturally. Floating cards keep countdowns and key dates always in view. Hachi Calendar combines Calendar + To-Do + AI Assistant + Floating Date Cards into one powerful, seamless interface. Browse vertically without switching views. Check off events like tasks. Let AI create, complete, and analyze your schedule. Supports Gregorian / Lunar calendars, seasonal terms, and traditional date references to help you plan smarter. ####Key Features Infinite Vertical Scrolling Browse past and future smoothly without switching pages. One-Page Operation Flow View, add, drag, copy, move, and complete — all on one screen. Events as To-Dos Mark events as completed and keep a record of progress. Integrated AI Assistant Create events from natural speech or text; AI parses times, reminders, repeats, and provides summaries, analytics, and free-time suggestions. Floating Countdown Cards Display countdowns, elapsed days, or key dates. Auto-highlights when deadlines approach. Time Insights & Analytics Discover active hours, time usage trends, and weekday/weekend differences. Quick Voice Input Long press to record → real-time transcription → release to create. Countdown indicator before recording ends. Smart Gap & Conflict Detection Detects available slots and prevents overlapping events. Key Dates Always Visible Floating cards + countdowns + quick jumps keep important days front and center. Emojis & Categories Add emojis and tags for quick visual identification. Multiple Reminders Standard alerts, countdown highlights, and completion feedback. Privacy First Local analytics only — no data uploaded. ####Typical Use Cases Say “Review meeting at 3 PM Friday, remind me 10 minutes before” → instantly created. Check off daily study or workout goals. Keep countdowns for exams, trips, or milestones visible. Ask AI for “next week’s free time” to schedule meetings. Review your time structure with automatic visual insights. Track lunar birthdays or seasonal events easily. ####Highlights True one-page vertical scrolling experience Events double as to-dos AI-powered creation, analysis, and scheduling suggestions Floating cards for countdowns & key dates Long-press voice input with dynamic countdown Supports Gregorian / Lunar / Solar Terms / Almanac Time usage insights and rhythm optimization Lightweight, fast, and information-dense ####Perfect For Users who want to manage schedules and tasks in one screen Heavy planners who love AI or quick voice entry Those who follow both modern and traditional calendars Anyone who needs countdowns and visual goal tracking People who want to analyze time usage to optimize their routines

Screenshots

Gengou4 screens
HachiCalendar2 Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Gengou at none against HachiCalendar2 Pro's 2. Gengou also leads on rating (3.8 vs 3.5) and review sentiment (66% vs 50%). HachiCalendar2 Pro's advantage is update cadence (fortnightly vs every 30 months) and ratings volume (23 vs 4). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

Gengou costs $0.99 and HachiCalendar2 Pro $1.99 up front. HachiCalendar2 Pro sells 2 one-off in-app purchases. Gengou asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Gengou holds the better App Store score, 3.8 against 3.5. That said, the two scores are not equally well evidenced: HachiCalendar2 Pro has 23 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 66% of Gengou's written reviews are positive against 50% of HachiCalendar2 Pro's.

UpkeepUpdate frequency

Gengou ships an update every 30 months, HachiCalendar2 Pro fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
Gengou versus HachiCalendar2 Pro: the parameters behind the verdict, then further details
ParameterGengouHachiCalendar2 Pro
Price$0.99 — better$1.99
Rating3.8 (4 ratings) — better3.5 (23 ratings)
Positive reviews66.1% of reviews — better49.9% of reviews
Number of ratings423 — better
Update frequencyEvery 30 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.1
Further details — not scored
Size3 MB43 MB
Age rating4+4+
DeveloperMasayuki Akamatsu加明 严

Customer experience

Gengou

All ratings4 ratings
Positive50.0%
Neutral25.0%
Negative25.0%
Written reviews56 reviews
Positive66.1%
Neutral10.7%
Negative23.2%

HachiCalendar2 Pro

All ratings23 ratings
Positive65.2%
Neutral4.3%
Negative30.4%
Written reviews341 reviews
Positive49.9%
Neutral11.1%
Negative39.0%

In-app purchases

None

Gengou

No in-app purchases

2 purchases

HachiCalendar2 Pro

One-time2
  • New Year Theme Pack$1.99
  • Weather Theme Pack$2.99

Questions

Is Gengou free?
Gengou costs $0.99, with no in-app purchases.
Is HachiCalendar2 Pro free?
HachiCalendar2 Pro costs $1.99, and also offers in-app purchases.
Which has better reviews, Gengou or HachiCalendar2 Pro?
Gengou is rated higher. Gengou averages 3.8 out of 5 from 4 ratings, while HachiCalendar2 Pro averages 3.5 from 23 ratings.
Do Gengou or HachiCalendar2 Pro have ads?
Neither Gengou nor HachiCalendar2 Pro shows ads.
Which is updated more often, Gengou or HachiCalendar2 Pro?
Gengou ships an update every 30 months, and HachiCalendar2 Pro fortnightly. Most recently, Gengou was updated on October 24, 2026 and HachiCalendar2 Pro on October 25, 2026.

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