Clever Invoice ‑ E‑Rechnung vs FlatInvoice ‑ PDF Invoice
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for Clever Invoice, Oct 13, 2026 for FlatInvoice.
The short answer
- Only FlatInvoice lists a free plan. Paid plans start at $9/month for Clever Invoice and $5/month for FlatInvoice.
- Clever Invoice lists 4 features FlatInvoice’s listing doesn’t mention, including Fields, Logos, Quotes.
Head to head
Starter
Professional
Business
Starter
- · 25 invoices a month, every feature
Flat Plan
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureClever Invoice macht Rechnungsstellung für Shopify-Händler so einfach wie eine WhatsApp-Nachricht. Sende eine Sprachnachricht, Text oder Foto – die KI erstellt automatisch eine rechtskonforme E-Rechnung mit allen Pflichtangaben. Perfekt für die E-Rechnungspflicht 2026: Generiere XRechnung und ZUGFeRD-Formate direkt aus deinen Bestellungen. GoBD-konform archiviert, DSGVO-konform auf EU-Servern gehostet.
Invoices email themselves the moment an order is placed — every order, every document, nothing to configure. A guided setup adds a Download-invoice button right inside Shopify's own order emails — copy, paste, done. Unlimited invoices, packing slips, receipts, and credit notes, each carrying your logo, with your brand color picked from it in one click. Tax-ready with a VAT/GST tax ID line and sequential numbering.
- Automatische E-Rechnung: XRechnung & ZUGFeRD aus jeder Shopify-Bestellung
- GoBD-konform & rechtssicher: Erfüllt die E-Rechnungspflicht ab 2026/2027
- B2B-ready: Automatischer Rechnungsversand an Geschäftskunden per E-Mail
- One-click PDF invoices and packing slips from any order
- A4 and US Letter formats with automatic page handling
- Your branding: business details, accent color, custom footer
- Paid, pending, and refunded status badges pulled from the order
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Clever Invoice |  FlatInvoice |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Clever Invoice | FlatInvoice |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 1 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Clever Invoice | FlatInvoice |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $9/month | $5/month(ahead) |
| Longest free trial | 14 days | 7 days |
| Plans listed | 3 | 2 |
Listing
| Measure | Clever Invoice | FlatInvoice |
|---|---|---|
| Shopify category rank | #407 | #383(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | May 1, 2026 | Jul 6, 2026 |
| Languages | 1 | 1 |
| Developer | dieBestenderStadt Media GmbH | Stelar Digital LLC |
FAQ
Clever Invoice and FlatInvoice: common questions
- Is Clever Invoice or FlatInvoice cheaper?
- Only FlatInvoice lists a free plan. Paid plans start at $9/month for Clever Invoice and $5/month for FlatInvoice. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Clever Invoice lists 4 the others don’t mention, such as Fields, Logos, Quotes, Receipts. FlatInvoice lists 3 the others don’t mention, such as Color and font, Invoices, Packing slips. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 14, 2026 for Clever Invoice, Oct 13, 2026 for FlatInvoice; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 14, 2026 for Clever Invoice, Oct 13, 2026 for FlatInvoice. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.