Comparison

和暦変換 vs TimeHack

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

Head to head
About

和暦変換

Features
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It is an application to convert the A.D. and Japanese Era. When you select the year from Showa, Heisei, or Reiwa, the corresponding year is displayed. When the era has not been decided yet, it will be displayed as "----".

About

TimeHack

Features
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Make your own time work for you. The day fills up and disappears. You studied hard, but you cannot really feel how far you got. TimeHack is a deliberately simple time log that turns those hours into something you can see. WHAT IT DOES Simple to record. No setup, no accounts. Add an entry and mark it done. Analysis that fits the question. Today, this week, this month, this year - your time is totalled up for you automatically. Progress you can see. Study, reading, training: watch the hours add up as a chart. "I actually did this much" is what carries you into tomorrow. Find the time you were losing. Once the aimless hours are visible, your days settle into a rhythm on their own. GOOD FOR - Logging study for an exam or a qualification - Tracking billable or side-project hours accurately - Anyone looking for a simple tool to build a habit - Ending the day with something to show for it BUILT TO STAY OUT OF THE WAY Recording should never feel like work, so everything unnecessary has been stripped out. Every time you open the chart, your effort is right there. Your entries stay on your device. Nothing is sent anywhere. Export to CSV any time from Settings.

Screenshots

和暦変換2 screens
TimeHack3 screens

Verdict

The call

The clearest difference is update cadence: 和暦変換 at every 9 days against TimeHack's every 3 months. TimeHack's advantage is iOS requirement (13.0 vs 17.6). 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

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

和暦変換 ships an update every 9 days, TimeHack every 3 months. The most recent releases landed on October 2, 2026 and September 23, 2026 respectively.

Scorecard2 real differences · 4 level
和暦変換 versus TimeHack: the parameters behind the verdict, then further details
Parameter和暦変換TimeHack
PriceFreeFree
Update frequencyEvery 9 days — betterEvery 3 months
AdsYesYes
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size114 MB33 MB
Age rating4+4+
DeveloperHiroyuki NishijimaAito Takazawa

In-app purchases

None

和暦変換

No in-app purchases

None

TimeHack

No in-app purchases

Questions

Is 和暦変換 free?
和暦変換 is free to download, with no in-app purchases.
Is TimeHack free?
TimeHack is free to download, with no in-app purchases.
Do 和暦変換 or TimeHack have ads?
Both 和暦変換 and TimeHack show ads.
Which is updated more often, 和暦変換 or TimeHack?
和暦変換 ships an update every 9 days, and TimeHack every 3 months. Most recently, 和暦変換 was updated on October 2, 2026 and TimeHack on September 23, 2026.

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