和暦変換 vs TimeHack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
和暦変換
Read full descriptionHide full description
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 "----".
TimeHack
Read full descriptionHide full description
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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | 和暦変換 | TimeHack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 3 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 114 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroyuki Nishijima | Aito Takazawa |
In-app purchases
和暦変換
No in-app purchases
TimeHack
No in-app purchases









