Comparison

Simple Invoice Maker vs 5dkey

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simple Invoice Maker

Features
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Simple Invoice Maker turns your iPhone into an invoicing desk. Create a professional invoice in under a minute, export it as a PDF, and send it to your client from wherever you are — the job site, the studio, the passenger seat. Built for freelancers, contractors, tradespeople, designers, tutors and small shops. No accounting degree, no monthly bookkeeping ritual, no desktop required. CREATE INVOICES IN MINUTES • 17 invoice templates, from plain and functional to polished and modern • Add line items with quantity, unit, price and per-item discounts • Your logo and hand-drawn signature on every invoice • Automatic totals, discounts and tax • Export and share as a clean PDF — email, message, or print it ESTIMATES AND QUOTES • Send an estimate first, then turn it into a real invoice with one tap • Estimates stay out of your revenue reports until they become invoices KEEP TRACK OF WHAT YOU'RE OWED • Mark invoices paid or unpaid as money lands • Reports tab shows paid versus outstanding at a glance • Due-date reminders so an unpaid invoice never quietly ages YOUR CLIENTS, SAVED • Reusable client records with billing address, contact details, company and VAT numbers • Pick a saved client and the invoice fills itself in SET IT UP ONCE • Business details, logo and signature saved for every future invoice • Configurable tax label and rate — VAT, GST, sales tax, whatever yours is called • Bank account details (account number, IBAN, BIC/SWIFT) printed on the invoice so clients can pay you • Invoice currency chosen per invoice, from 30+ currencies • Light and dark themes START WITH SOMETHING ON SCREEN New installs come with a couple of clearly labelled sample invoices, so you can see how the app works and try the templates before typing anything. Clear them in one tap when you're ready for the real thing. FREE AND PRO The free version includes 5 invoices, 3 templates, and a small "Created with SimpleInvoiceMaker" line on your PDFs. Pro unlocks: • Unlimited invoices and estimates • All 17 templates • No watermark on your invoices • Invoice due-date reminders Prefer to earn it? Share the app with someone who invoices and we'll add 30 days of Pro to your account. SUBSCRIPTION DETAILS Pro is available as a monthly, 6-month or annual auto-renewing subscription. Prices are shown in the app in your local currency before you confirm anything. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage your subscription and turn off auto-renewal in your Apple Account settings after purchase. Privacy Policy: https://jigsawlab.com/privacy.php Terms of Use: https://jigsawlab.com/terms.php Questions, bugs or a feature you need? Write to us — this app gets built from what users ask for.

About

5dkey

Features
Read full description

5dkey allows you to badge your phone on select card readers, just like you would a physical access control card. You can also activate sensors on roller doors at a distance. The app communicates with card readers using Bluetooth. Virtual cards or vCards are administered by your access control or security system administrator.

Screenshots

Simple Invoice Maker4 screens
5dkey4 screens

Verdict

The call

The clearest difference is in-app purchases: 5dkey at none against Simple Invoice Maker's 3. On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Invoice Maker sells 3 in-app purchases, starting at $3.99 per month. 5dkey asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Invoice Maker ships an update every 4 months, 5dkey every 3 months. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 5 level
Simple Invoice Maker versus 5dkey: the parameters behind the verdict, then further details
ParameterSimple Invoice Maker5dkey
PriceFreeFree
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size14 MB79 MB
Age rating4+4+
DeveloperiCometSitepics.app Pty Ltd

In-app purchases

3 purchases

Simple Invoice Maker

Subscriptions3
  • Monthly Subscription$3.991 Month
  • 6 Months Subscription$19.996 Months
  • 1 Year Subscription$39.991 Year
None

5dkey

No in-app purchases

Questions

Is Simple Invoice Maker free?
Simple Invoice Maker is free to download, with in-app purchases available.
Is 5dkey free?
5dkey is free to download, with no in-app purchases.
Do Simple Invoice Maker or 5dkey have ads?
Neither Simple Invoice Maker nor 5dkey shows ads.
Which is updated more often, Simple Invoice Maker or 5dkey?
Simple Invoice Maker ships an update every 4 months, and 5dkey every 3 months. Most recently, Simple Invoice Maker was updated on October 20, 2026 and 5dkey on October 10, 2026.

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