# DiamVAT — VAT ID checks, EC sales list > VAT ID checks, EC sales list (iPhone/iPad app by Mario Onar.) - Source: https://appshunter.io/ios/app/diamvat/id6820904466 (this page in markdown: same URL + `.md`) - Developer: [Mario Onar](https://appshunter.io/developer/6780881836) - Category: Finance, Business - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 26.0 · 27 MB - Languages: American English, German (Germany) - Released: 2026-11-04 - Data updated: 2026-11-10 ## What is DiamVAT? DiamVAT validates VAT identification numbers officially, keeps proof of every check and submits your German VAT filings to the tax administration with your own ELSTER certificate – for businesses, bookkeeping and tax advisors. No account, no ads. BUY ONCE, USE FOREVER DiamVAT Basic is free forever. DiamVAT Pro unlocks everything with a single one-time purchase – no subscription, no hidden costs, no ads. One purchase covers iPhone, iPad and Mac. Before you buy, try every Pro feature free for 14 days: the trial costs €0, ends by itself and is never charged. VALIDATE • Check VAT IDs from all EU member states one by one, from text, from a photo of an invoice or from a file import (Excel, CSV) • Officially through the interface of the German Federal Central Tax Office (BZSt, § 18e UStG), optionally qualified with company name and address; German numbers via VIES • Clear results instead of response codes: valid, not confirmed, format error, technical problem – with a recommendation • Bulk checks continue in the background and notify you when done PROVE • Every check is stored with time, source and response – exportable as a PDF report, ready for a tax audit • History and archive per company, repeated checks visible FILE AND SUBMIT • EC sales list (ZM): enter or import rows, verify numbers with the BZSt, reconcile with your advance returns, reporting period under § 18a UStG with deadlines • Advance VAT return (UStVA) with every box of the official form, calculation, plausibility checks and the form as PDF • Permanent extension and special advance payment – DiamVAT totals last year’s advance returns for you • Annual VAT return with annexes UN and FV, carried over from the advance returns • Messages to the tax office: objection, deadline extension, deferral, free-form message and supporting documents with PDF attachments • Official check of every filing with the tax administration’s library (ERiC) – on the Mac inside the app, on iPhone and iPad through DiamVAT’s submission service on a server in Germany • Submission with your own ELSTER certificate: overview sheet before sending, protection against double filing, transmission protocol with transfer ticket as proof (Pro) THE DIAMASSISTENT • Guides you in everyday language through the advance return, the annual return, the EC sales list and the permanent extension – you answer questions, DiamVAT fills in the boxes • Explains every question via the ⓘ including the legal basis, shows only the fields that concern you and calculates tax and input tax itself • Remembers what your filings look like – next time you only enter the amounts SEVERAL COMPANIES • Any number of companies with their own master data, tax number and certificate; VAT groups with a consolidated return YOUR DATA • Your data stays on your device and – if you switch it on – in your personal iCloud; backup export and import • Requests go to the BZSt, to VIES or to the tax administration only when you trigger them; the submission service stores nothing and has no accounts • App lock with Face ID or Touch ID; guides, privacy and legal notes inside the app, in German and English • App design, accent colours and all app icons selectable BASIC AND PRO IN DETAIL Basic includes unlimited format checks, ten official checks, imports up to ten rows and every filing form including the DiamAssistent. Pro adds the submission to the tax administration, unlimited official checks and imports, result exports, the EC sales list CSV assistant, PDF reports and photo recognition. Small businesses under § 19 UStG can submit their annual return once a year with Basic as well. DiamVAT is made for businesses in Germany: the filings follow the official forms of the German tax administration. DiamVAT is not an offering of the Federal Central Tax Office or the tax administration and does not replace tax advice. ELSTER is a trademark of the Free State of Bavaria; DiamVAT is suitable for use with ELSTER. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | DiamVAT Pro | $0.99 | one-time | | 14-day Trial | Free | one-time | ## Is DiamVAT safe? Not enough ratings yet to assess DiamVAT. ## Is DiamVAT legit? DiamVAT has limited verification signals. The AppsHunter Legitimacy Score for DiamVAT is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.0.2 — 2026-11-09 DiamVAT Pro at a glance: Pro now comes second in Settings – with the price and a buy button, the free 14-day trial as the second option below it. The purchase screen shows the purchase first and also lists submitting every filing to ELSTER. On the third launch DiamVAT Pro introduces itself once – “Later” closes it and it won’t come back. ### 1.0.1 — 2026-11-08 DiamVAT Pro now costs €0.99 – a one-off purchase, no subscription, no follow-up costs, valid on iPhone, iPad and Mac. The free 14-day trial stays. New in Settings: “Enjoying DiamVAT?” takes you straight to rating the app in the App Store. ### 1.0 — 2026-11-04 No release notes. ## More apps by Mario Onar - [DiamLaw](https://appshunter.io/ios/app/diamlaw/id6802042486) - [DiamMath](https://appshunter.io/ios/app/diammath/id6820259733) All apps by Mario Onar: https://appshunter.io/developer/6780881836 ## Related topics [oniro](https://appshunter.io/ios/topics/oniro) · [amol pomane](https://appshunter.io/ios/topics/amol-pomane) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*