Comparison

Invoice Rex vs Subscription Day. Calendar

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

Head to head
About

Invoice Rex

Features
Read full description

Be the king of your invoices. Invoice Rex is a powerful invoicing tool that allows you to issue invoices, customize their appearance and a lot more while synchronizing seamlessly between all of your devices (macOS, iOS and iPadOS) securely via iCloud without any content being stored on our or anyone else's servers. Aside from issuing invoices, Invoice Rex allows you to track other business-related documents like bank statements, cash receipts, storage, journey log and much more. Invoice Rex is designed with you and your comfort in mind - it is simple to use, yet powerful. But if you need any help, there's always a user guide available right from within the app. And if that does not answer your questions, there's a support dialog in the app that allows you to contact us with just a few clicks or taps. Customize the template for printing invoices, bills and other documents just the way you like. Invoice Rex has been written using the latest UI technologies Apple offers, allowing for a single implementation of both its core and the UI to be shared across the entire Apple ecosystem. Invoice Rex is free to use for the first 14 days, then a subscription is required to use the app. You can choose to be billed either monthly or annually.  EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Subscription Day. Calendar

Manage your paid subscriptions and avoid unexpected charges with this intuitive calendar app. Track monthly, yearly, and trial plans with smart notifications and detailed insights into your spending.

Highlights
  • Visual subscription calendar
  • Home screen widgets
  • Multiple subscription types
  • Smart payment reminders
  • Spending statistics and insights
  • Personal and work lists
  • Multi-currency support
  • iCloud sync
Features
Read full description

If you have so many subscriptions that you’ve lost track of them and hate unexpected charges, Subscription Day is built exactly for this. Subscription Day is a simple and powerful subscription calendar for iOS & Mac. No clutter. Only what really matters. • Visual Calendar: See the current month and all upcoming payments at a glance. • Widgets. Quickly check your most important subscription information right from your Home Screen. • Subscription Types: Supports monthly subscriptions, yearly plans, trial versions, one time purchases, and fully custom billing periods. • Smart Notifications: Set reminders so you never miss a charge or forget to cancel a trial. • Highlights: Easily flag important items like annual, trial, or one‑time payments. • Statistics and Insights: Get a clear overview of your projected yearly budget, average monthly costs, and peak spending months with a clean radial chart. • Personal/Work/Custom Lists: Separate subscriptions into Personal and Work lists and track budgets and statistics independently. • Custom own categories: Organize subscriptions using your own categories exactly the way you prefer. • Multi-Currency Support: Supports 150+ currencies with automatic conversion so everything is shown in your selected currency. • Status Management: Mark subscriptions as active or canceled and keep your statistics always accurate. • Quick Addition: Start typing a service name and get automatic suggestions including logo, category, and color. You can also choose emojis or symbols for custom avatars. • Smart Import Manager: Import subscriptions in one click from Notion, Google Sheets, or from any text file in any structure. You can also import directly from the App Store by recognizing subscriptions from screenshots. • Generate period based PDF reports for accountants and employers & export your data • iCloud Sync: Your subscriptions stay in sync across all your devices. • iPad Support. Important note: Subscription Day does not automatically detect or fetch your subscriptions. You add them manually or use the smart import manager to bring in existing subscription lists from your documents and tools. Subscription Day is constantly evolving. We actively listen to user feedback and would love to hear your ideas via email. Have a great day.

Screenshots

Invoice Rex4 screens
Subscription Day. Calendar4 screens

Verdict

The call

The clearest difference is update cadence: Subscription Day. Calendar at weekly against Invoice Rex's monthly. On price, ads, in-app purchases 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. Invoice Rex sells 2 in-app purchases, starting at $4.99 per month and Subscription Day. Calendar sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Invoice Rex ships an update monthly, Subscription Day. Calendar weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
Invoice Rex versus Subscription Day. Calendar: the parameters behind the verdict, then further details
ParameterInvoice RexSubscription Day. Calendar
PriceFreeFree
Rating—4.8 (19 ratings) — better
Positive reviews—83.7% of reviews
Number of ratings—19 — better
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.017.0
Further details — not scored
Size18 MB21 MB
Age rating4+4+
DeveloperCharlie Monroe Software, s.r.o.Chuta Dmytro

In-app purchases

2 purchases

Invoice Rex

Subscriptions2
  • Monthly14 Days trial$4.991 Month
  • Yearly14 Days trial$49.991 Year
5 purchases

Subscription Day. Calendar

One-time5
  • Upgrade to Family$6.99
  • Single (Promo)$17.99
  • Single (Lifetime)$19.99
Show 2 more
  • Family (Promo)$23.99
  • Family Sharing (Lifetime)$26.99

Questions

Is Invoice Rex free?
Invoice Rex is free to download, with in-app purchases available.
Is Subscription Day. Calendar free?
Subscription Day. Calendar is free to download, with in-app purchases available.
Do Invoice Rex or Subscription Day. Calendar have ads?
Neither Invoice Rex nor Subscription Day. Calendar shows ads.
Which is updated more often, Invoice Rex or Subscription Day. Calendar?
Invoice Rex ships an update monthly, and Subscription Day. Calendar weekly. Most recently, Invoice Rex was updated on October 25, 2026 and Subscription Day. Calendar on October 24, 2026.

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