PointDays vs ざっくり換算
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PointDays
Manage important life event countdowns. Track days remaining until significant occasions. Primarily designed for users in Japan.
- Life event management
- Day countdown tracking
- Japanese language support
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You can management the days of the life event. This app is for Japanese mainly.
ざっくり換算
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When calculating something on your smartphone, entering each number one by one can be quite a hassle. This app eliminates the need to enter numbers when you want to convert. It's useful when you want to quickly get a rough calculation result. "New Conversion Method Proposal Q&A" Q1: How is this different from using a calculator? A1: With a calculator, you press each number key one by one. You have to be careful not to press the wrong key... If you use "Rough Conversion," it's easy: just align the red indicator with the scale and the converted value will appear. Q2: When repeating similar conversions, it's a hassle to have to re-enter numbers multiple times... A2: With "Rough Conversion," you can just slide the indicator along the scale and "see consecutive conversion results immediately." Q3: But it can't do a variety of calculations, right? A3: It can't do a variety of calculations like a calculator. However, if you register the conversions you frequently use in advance, you can use the "Rough Conversion" function to create something like your own "personal slide rule." [Features] - Easily convert values without having to enter them yourself; simply slide your finger across the red indicator on the panel. - Quickly see approximate calculations. - You can freely customize the units you want to convert in advance. - You can also switch the conversion range, allowing you to convert over a wide or narrow range. - You can also freely set the title of the app's conversion screen. - The values and units you set in the settings screen will remain the same the next time you launch the app. * The default setting is "tsubo" ←→ "m2" when converting land area. This can be freely customized. * The first time you use the app, please press Reset on the "Settings" screen. - You can freely register and save the conversions you want. ・You can easily use the app by simply tapping the title you want to use from the list of registered conversions to switch between them. ・You can freely change or delete registered conversion data at any time. ・You can also save registered conversion data on iCloud, so you can carry over your conversion data if you change your device. ・The registered list of conversion values comes with several conversion patterns pre-loaded as examples (such as length and area conversions). *Please feel free to change or delete them as you like. *Conversion example data is automatically installed when you download this app for the first time. *If you are already using the app, the registered conversion value list may not be displayed even after updating. If this happens, please delete the app from your device and then download it again.
Screenshots
Verdict
The clearest difference is ads: PointDays at none against ざっくり換算's shown. PointDays also leads on iOS requirement (9.0 vs 16.6). ざっくり換算's advantage is update cadence (every 2 months vs every 18 months). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PointDays ships an update every 18 months, ざっくり換算 every 2 months. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.
| Parameter | PointDays | ざっくり換算 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 35.3% of reviews | — |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 9 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Keietsu Yasuhara | Masayuki Sato |
In-app purchases
PointDays
No in-app purchases
ざっくり換算
No in-app purchases









