DiamApps
Native apps for iPhone, iPad and Mac – carefully engineered, elegantly designed and built around your privacy from the very first line.
Discover our apps
Portfolio
Our apps
Every DiamApps app is written entirely in Swift and SwiftUI – from the first sketch to the final polish, all from one pair of hands.
DiamVAT
VAT under control
Verifies VAT identification numbers (Umsatzsteuer-Identifikationsnummer, USt-IdNr.) through the official interfaces of the German Federal Central Tax Office (Bundeszentralamt für Steuern, BZSt) and the EU VIES system – one at a time or as a batch from an Excel file. Every check is documented as a PDF report, and EC Sales Lists (Zusammenfassende Meldung), advance VAT returns and annual returns are prepared right up to submission through ELSTER, the German tax authorities’ online portal, on the Mac – in this version solely as a test submission to the tax administration’s test system.
iPhone
iPad
Mac
Beta 1.23.3
View DiamVAT →
DiamLaw
Statutes and case law offline
145 German federal statutes and 8 EU legal acts with 23,790 individual provisions – entirely offline, in a calm reading view. Add to that a case-law search, chains of cross-referenced provisions, highlights, notes and a study mode with reviewed exam schemes.
iPhone
iPad
In development
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DiamMath
Plot, calculate, understand
Functions on a true-to-scale 2D graph, surfaces in 3D, systems of equations with a solution path you can check, and a dedicated maths keyboard that turns your input into properly typeset formulas as you go. Everything is calculated locally on your device.
iPhone
iPad
Mac
In development
View DiamMath →
Family trait
Your app, your look
All DiamApps share the same design layer: every app can be set up to suit you – not the other way round.
Your own backgrounds
A separate image from your photo library for each area, with freely adjustable opacity. The images stay on your device – only if you switch on iCloud sync do they also live in your personal iCloud.
Type the way you like it
Typeface and size are yours to choose, in DiamLaw the line and paragraph spacing as well – and in DiamLaw even separate text colours for body text, secondary text and numbers.
Colours and icons
Seven accent colours from deep blue to graphite and adjustable card colours with transparency – plus app icons in gemstone colours, in DiamMath even with a day and a night version.
Studio
About DiamApps
DiamApps is an independent app studio. The diamond stands for the standard we hold ourselves to: clear structure, a clean cut, lasting value.
100 % native
Swift, SwiftUI and the latest Apple technologies – no compromises, no framework ballast.
Privacy first
Your data stays on your device. No accounts, no tracking, no obligatory cloud – syncing through iCloud is always your decision.
Attention to detail
Modern design, fluid animations and considered controls – down to the last pixel.