Mac Tools 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.
Mac Tools
This utility transforms your smartphone into a sound and vibration detection tool. It assists technicians in pinpointing issues in vehicles and machinery by analyzing rattles, squeaks, and grinding noises. Requires specialized hardware to function.
- Sound and vibration detection
- Locates defective or worn parts
- User-friendly interface
- Analog and digital display options
- Adjustable sound settings
- Informative user guide
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The Mac Tools SmartEAR1 Sound & Vibration Detection app was developed to help assist the service technician in locating and finding defective or worn parts in automobiles, heavy machinery or industrial equipment where vibration, rattles, squeaks and grinding sounds would be associated making the task very difficult or impossible to diagnose. When used with our specially designed hardware kits your smartphone will be transformed into a state of the art Sound & Vibration Detection Technicians Tool allowing for ease of locating and finding those troubled areas. NOTE: Additional hardware is required to use this app. For information on how to purchase hardware please contact your local Mac Tools Distributor or call 1-800-MAC-TOOLS Features: User friendly interface and intuitive operation. Sound level reading displays average, peak and real-time values. Sound level readings are displayed in either Analog or Digital. Analog and Digital readings have 2 display panels the user can choose from. Analog Meter or Analog Wave-Form. Digital Numeric or Digital Bar Graph. Background sound off-setting, sample rates, decibel off-setting can be manually be set. Reset/Refresh buttons reset/refresh values to default settings. Sound Level Reading Sampling Rate Decibel Off-set Master Volume Control User information guide includes informative facts about sound perception and permissible noise level exposure as well as a sound level comparison reference chart. Additional Information: Required: Any iOS device running iOS5.0+. Recommended: iPhone 4 and newer/ iPod Touch 4 and newer. Compatible: iPad 2 and newer.
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: Mac Tools at none against ざっくり換算's shown. Mac Tools also leads on device support (3 vs 1). ざっくり換算's advantage is update cadence (every 2 months vs every 22 months). On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Mac Tools ships an update every 22 months, ざっくり換算 every 2 months. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.
| Parameter | Mac Tools | ざっくり換算 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 22 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 12 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | JS Products, Inc. | Masayuki Sato |
In-app purchases
Mac Tools
No in-app purchases
ざっくり換算
No in-app purchases









