GST NZ Calculator
by Chewy Applications
- Finance
- Paid
- Zombie
- Rating
- 3.5
- 2 ratings
- Top 91%among 52 Finance apps
- Last update
- Jul 22, 2025
- Version 3.0
- Size
- 1 MB
- Category
- Finance
- Tracked since
- Oct 9, 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.
GST Kiwi is a simple GST calculator for the New Zealand Goods and Services Tax.
The fastest and most straight forward GST app on the App Store. Simply enter your value in one of three boxes, and the other values are calculated as you key in the numbers.
GST Kiwi is useful in three specific cases:
- 'Removing GST': When you have a price which already includes GST, and you need to know the GST component of that value, and the amount left after GST is excluded.
- Adding GST': When you know a price excluding GST, and you need to know how much GST will be added, and what the final value is including GST.
- 'Working backwards': When you only know the GST amount, and you need to know what the original price of the goods were, excluding and including GST.
Why GST Kiwi is great:
COPY AND PASTE
Starting values can be paste into any field, and results can be copied and pasted into other apps.
QUICK ENTRY
The large number-pad is quick and easy.
AUTOMATIC CALCULATIONS
Results are calculated and displayed as you key in the numbers.
QUICK RESET
Tap the clear button in any of the boxes to reset the calculation.
MULTI-PURPOSE
Enter a value in any of the three input fields, and the other two fields will be calculated from that.
UNIVERSAL APP
GST Kiwi is a Universal app, meaning you only buy it once and can install it for free on your iPhone, iPad, or Mac
What’s new
Release notes for the latest version, as written by the developer.
v3.0 is a complete rebuild with all the old features you love, and a few key improvements:
- copy buttons for each field
- double-tap to paste in any field
- settings to customise behaviour
- dark mode
Rank history
Daily position in the New Zealand charts. #1 is at the top.
- Best rank
- #5
- 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.
50/100
Not flagged as small & simple
- Developer size0% · 25
Developer: 6 apps on the charts
- Audience size– · 20
No data, weight redistributed
- App size100% · 10
Size: 1 MB
- Price model100% · 15
Price model: paid
- Demand proof50% · 30
Best rank #5, 1 country
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 3.0LatestReleased Jul 22, 2025