SwingTool - Swing Weight
by Sten Kaiser
- Sports
- Paid
- Zombie
- Rating
- 4.2
- 17 ratings · US storefront
- Top 84%among 86 Sports apps
- Last update
- Mar 22, 2017
- Version 2.1
- Size
- 2 MB
- Category
- Sports
- Tracked since
- Oct 10, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
SwingTool can quickly and easily measure the swing weight of tennis racquets, golf clubs, baseball bats etc. Swing weight is the most important parameter when deciding how a racquet, club or bat feels when you swing it. Unfortunately measuring swing weight has been fairly complicated, until now. With SwingTool it is enough to just hang your equipment and let it swing like a pendulum. Place the iPhone close to the swinging end and it will automatically display the swing weight.
Characteristics
- Can be used for all types equipment
- Choose any point to calculate the swing weight at
- Choose any point to hang the equipment at (independent of the swing point)
- Faster and more accurate than the traditional way to measure swing weight
- Can be used to measure the swing time of any pendulum with 0.01 s accuracy
A demo video is available at appmaker.se/swingTool
To golfers: With this app you do MOI-matching i.e. it measures the real dynamic swing weight (moment of inertia). Not the static Lorythmic balance point (D9, C4 etc) that sometimes is called swing weight.
What’s new
Release notes for the latest version, as written by the developer.
- Decimal comma in relevant countries.
- A new twist weight guide.
- Interface improvements on some devices.
- Camera light on supported iPads.
Rank history
Daily position in the Brazil charts. #1 is at the top.
- Best rank
- #4
- Current rank
- #6
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
75/100
Not flagged as small & simple
- Developer size0% · 25
Developer: 9 apps on the charts
- Audience size100% · 20
Ratings: 17
- App size100% · 10
Size: 2 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #4, 32 countries
An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2
How the score worksVersion history
- 2.1LatestReleased Mar 22, 2017