AppMarketSpy › Utilities › UnderDrive
★ 5.00average rating
1ratings
+0new ratings, last 7 days
—not in top charts now
Ratings breakdown
| ★★★★★ | 100% | |
| ★★★★ | 0% | |
| ★★★ | 0% | |
| ★★ | 0% | |
| ★ | 0% |
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App info
- Developer
- Dave Clark
- Category
- Utilities, Education
- Released
- Sep 9, 2026
- Version
- 1.1 (Sep 17, 2026)
- Price
- $9.99
- Size
- 1.7 MB
- Requires
- iOS 18.6
- Age rating
- 4+
- Languages
- English
In-app purchases
noneCurrent prices, App Store US.
About UnderDrive
App for calculating speeds, final drive and RPM drop when shifting gears. App is setup for a three speed transmission. An input to define torque converter loss. A manual clutch is closer to 100 percent efficient, however a converter could be anywhere from 80 to 98 percent efficient. All input boxes have a typical value entered for reference. Different transmission setups can be named, dated and saved for later retrieval. This app makes quick work of comparing different ratios and underdrive gears.
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