Comparison

GroupsPro vs Solo Invoice

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

Head to head
About

GroupsPro

Organize contacts into groups and create flexible mailing lists for mass SMS and email. Send files and photos with emails, search contacts efficiently, and export data to Excel or CSV. Protect your data with passcode or biometric authentication.

Highlights
  • Create and modify contact groups
  • Assign contacts to groups
  • Create and modify mailing lists
  • Send files and photos via email
  • Export contacts to Excel/CSV
  • Passcode/biometric access protection
  • Transfer lists via Bluetooth
Features
Read full description

Organize contacts, manage groups and create mailing lists for SMS and email. Create groups, assign contacts to them and reach multiple recipients at once. Create flexible mailing lists that can include entire groups or individual contacts and export contact data when needed. Features: • Create and modify groups of address book contacts • Assign contacts to groups (single and fast assigning) • Create and modify mailing lists for mass SMS and emails • Send files (e.g. Word, Excel, PDF) and photos with mass email • Search for names, phone numbers, email addresses, postal addresses, departments and notes within all contacts • Company name on the list • Export to Excel and CSV files • GroupsPro own grouping (e.g. for Exchange) • See details of your contacts • Access protection by passcode or Touch ID / Face ID • Transfer the mailing lists to another device with Bluetooth • Help (see "More/Help" within the app) • And more Pay once – install and use it on multiple devices (iPhone/iPad) with the same App Store account or Family Sharing. ------------------------------------------------------- Grouping for some address books (e.g. Exchange) is not supported from iOS respectively from the concerning address book. For contacts of such address books GroupsPro offers its own grouping.

About

Solo Invoice

Create quotes, delivery notes, invoices, and receipts with unlimited line items. This app is designed for sole proprietors and freelancers, keeping all your data securely on your device without requiring an account or cloud storage.

Highlights
  • Unlimited line items
  • Four document types (quote, invoice, receipt, delivery note)
  • Offline data storage
  • Japanese Qualified Invoice System compliant
  • Customizable tax rates and rounding
  • Digital seal and logo placement
Features
Read full description

There is no cap on line items. Nothing stops at 26 rows, and nothing gets cut off on page two. Estimate, delivery note, invoice and receipt are all made from the same rows in a single tap. Solo Invoice is an invoicing app for one-person businesses – freelancers, contractors and side-hustlers who do their own paperwork. No account, no cloud. What you type stays on your device. NEVER RUN OUT OF ROWS - Unlimited line items; A4 pages are added automatically - The date column is free text: leave it blank or write a period - Units such as hrs, days or pcs - Heading rows to group work into sections - Drag to reorder FOUR DOCUMENTS, ONE SET OF ROWS - Invoice / Estimate / Packing slip / Receipt - Turn a estimate into an invoice, or an invoice into a receipt, in one tap SALES TAX, YOUR WAY - Sales tax differs by state and county, so you can enter any rate (e.g. 8.875%) - Per-line tax rates, with a summary per rate - Tax exclusive, tax inclusive, or no tax - You choose the rounding: down, up or half up PICK A DESIGN (NEW IN 1.2) - Classic, Modern or Minimal - Six accent colors: ink, navy, green, crimson, orange, violet - The preview updates as you choose, and every PDF follows it KNOW WHAT HAS BEEN PAID (NEW IN 1.2) - Expected payment date and paid date on each invoice - "Paid", "Overdue" and "Due soon" at a glance in the list - Filter to unpaid invoices only - Payment records stay on the device and never print on the PDF ENTER IT ONCE - Business name, address, phone, email, and your EIN - Payment details: bank, routing number (ABA), account number and SWIFT - Logo and stamp/signature image - Automatic document numbers SEE IT BEFORE YOU SEND IT - Check every page of the PDF in the app before you share it - Share by Mail, Messages, AirDrop, Files or AirPrint ALSO FOR OTHER COUNTRIES - Switch any document to US, UK, Australian, German, French or Japanese format – currency, tax names and rates, IDs and payment fields change with it NO ADS - No ad SDK, no banner covering your buttons PRICING - A one-time purchase. Nothing more to pay afterwards - No in-app purchases and no subscription - Every feature is available from the start, with no caps on documents or line items YOUR DATA - What you enter never leaves your device. To improve the app, only anonymous usage data (such as which screens are opened) is counted with Google Analytics (you can turn this off in Settings). - No sign-up - Export a JSON backup before you change phones, and CSV for your bookkeeping Publisher: Sauna Inc. Support: https://tokyo357.com/support Privacy: https://tokyo357.com/privacy

Screenshots

GroupsPro4 screens
Solo Invoice4 screens

Verdict

The call

The clearest difference is review sentiment: Solo Invoice at 100% against GroupsPro's 29%. Solo Invoice also leads on update cadence (weekly vs every 2 months) and price ($0.99 vs $1.99). GroupsPro's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases and monetization model 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

GroupsPro costs $1.99 and Solo Invoice $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

GroupsPro ships an update every 2 months, Solo Invoice weekly. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
GroupsPro versus Solo Invoice: the parameters behind the verdict, then further details
ParameterGroupsProSolo Invoice
Price$1.99$0.99 — better
Rating5.0 (2 ratings) — better—
Positive reviews28.9% of reviews100.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size7 MB4 MB
Age rating4+4+
DeveloperDemodit GmbHDaisuke Yamaguchi

Customer experience

GroupsPro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews45 reviews
Positive28.9%
Neutral6.7%
Negative64.4%

Solo Invoice

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GroupsPro

No in-app purchases

None

Solo Invoice

No in-app purchases

Questions

Is GroupsPro free?
GroupsPro costs $1.99, with no in-app purchases.
Is Solo Invoice free?
Solo Invoice costs $0.99, with no in-app purchases.
Do GroupsPro or Solo Invoice have ads?
Neither GroupsPro nor Solo Invoice shows ads.
Which is updated more often, GroupsPro or Solo Invoice?
GroupsPro ships an update every 2 months, and Solo Invoice weekly. Most recently, GroupsPro was updated on October 16, 2026 and Solo Invoice on October 9, 2026.

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