Four To Twenty Downloads & RevenueFour To Twenty: mA/V Converter · App Store
Not in any tracked top chart right now.
Updated 3 Nov 2026 · rankings refresh through the day
DeveloperJon Giambattista
CategoryUtilities
Price0.99 GBP
Released
Rating★ 3.0 (1)
Version2.0
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026Installs (est.)1k+ worldwide
Four To Twenty: mA/V Converter update history & changes
Last change · 16 events since 30 Oct 2017Full timeline ↓📈Charting in a new country📈Entered the top 100🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 15 events in the last 12 months
- 📈Four To Twenty: mA/V Converter charting in a new countryMalaysia
- 📈Four To Twenty: mA/V Converter entered the top 100Top Paid · Utilities · IT
- 📈Four To Twenty: mA/V Converter charting in a new countryItaly
- 📈Four To Twenty: mA/V Converter charting in a new countryGermany
- 📈Four To Twenty: mA/V Converter entered the top 100Top Paid · Utilities · ID
- 📈Four To Twenty: mA/V Converter charting in a new countryIndonesia
- 📈Four To Twenty: mA/V Converter entered the top 100Top Paid · Utilities · GB
- 📈Four To Twenty: mA/V Converter charting in a new country in 3 chartsUnited Kingdom · United States · Vietnam
- 📈Four To Twenty: mA/V Converter entered the top 100Top Paid · Utilities · AU
- 📈Four To Twenty: mA/V Converter charting in a new countryChina
- 📈Four To Twenty: mA/V Converter charting in a new countryTaiwan
- 📈Four To Twenty: mA/V Converter charting in a new countryThailand
- 📈Four To Twenty: mA/V Converter charting in a new countryCanada
- 🆕Four To Twenty: mA/V Converter first spotted by AppInsider#7 in Top Paid · Utilities · Australia
- 🆕Four To Twenty: mA/V Converter released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
3.0 ★
1 ratings
Measured
Four To Twenty: mA/V Converter on the App Store
App details
App ID
1302909664
Publisher
Jon Giambattista
On the store since
Oct 2017
9 years on the store
Minimum OS
iOS 10.2+
iPhone 5 and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
15 MB
Also listed in
Productivity
Four To Twenty: mA/V Converter downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
3.0 ★
1 ratings
Measured
Ratings
1
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.3★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Utilities apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Four To Twenty: mA/V Converter
A simple calculator for converting electrical signals, typically 4-20mA scaled to an appropriate process signal (ex: 0-1000 psi).
Choose from a wide variety of preset signal inputs and process signal outputs or enter your own custom values.
Choose from 8 different themes.
Choose from a wide variety of preset signal inputs and process signal outputs or enter your own custom values.
Choose from 8 different themes.
Latest updates
2.0
Added support for negative numbers.
Choose from 8 different themes.
Fixed an issue with comma decimal point calculations.
