ざっくり換算 vs Side Search
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Side Search
Launch your preferred AI assistant or search engine using the Side Button or Action Button. Customize assistants with custom URLs or integrate with Apple Foundation Models, Claude API, or Google Gemini API.
- Launch AI assistants via Side/Action Button
- Custom URL-based assistants
- Apple Foundation Models integration
- Claude API support
- Google Gemini API support
- Side Bridge for custom endpoints
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Quickly launch your preferred AI assistant or search engine as a voice assistant from the Side Button or Action Button. ### Launch from Side Button ### On iPhone in Japan, you can assign Side Search to the Side Button. You can start your favorite assistant by pressing and holding the Side Button. ### Assistants ### --- URL Based Assistant You can turn various AI assistants and search engines into assistants by setting a custom URL. --- Apple Foundation Models You can converse with privacy-focused models on devices that support Apple Intelligence. --- Claude API You can ask Claude to perform web searches or ask questions using your own API key. --- Google Gemini API You can converse with Gemini and ask it to perform web searches using your own API Key. --- Side Bridge For advanced users, you can use any assistant by creating an endpoint called Side Bridge.
Screenshots
Verdict
The clearest difference is ads: Side Search at none against ざっくり換算's shown. Side Search also leads on update cadence (weekly vs every 2 months). ざっくり換算's advantage is iOS requirement (16.6 vs 27.0). 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.
ざっくり換算 ships an update every 2 months, Side Search weekly. The most recent releases landed on October 7, 2026 and October 20, 2026 respectively.
| Parameter | ざっくり換算 | Side Search |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 2 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 27.0 |
| Further details — not scored | ||
| Size | 4 MB | 36 MB |
| Age rating | 4+ | 17+ |
| Developer | Masayuki Sato | Cizzuk Shihu |
In-app purchases
ざっくり換算
No in-app purchases
Side Search
No in-app purchases









