# Invoice Rex vs Subscription Day. Calendar

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.

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.

Invoice Rex ships an update monthly, Subscription Day. Calendar weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Invoice Rex | Subscription Day. Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (19 ratings)](https://appshunter.io/ios/app/subscription-day-calendar/id6743316600/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 83.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free |
| Size | 18 MB | 21 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Charlie Monroe Software, s.r.o.](https://appshunter.io/developer/647791583) | [Chuta Dmytro](https://appshunter.io/developer/1792181039) |

## What reviewers say

### Invoice Rex

[App page](https://appshunter.io/ios/app/invoice-rex/id6480509935)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $49.99 | per year |


### Subscription Day. Calendar

[App page](https://appshunter.io/ios/app/subscription-day-calendar/id6743316600)

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:** Family Sharing, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Family | $6.99 | one-time |
| Single (Promo) | $17.99 | one-time |
| Single (Lifetime) | $19.99 | one-time |
| Family (Promo) | $23.99 | one-time |
| Family Sharing (Lifetime) | $26.99 | one-time |


## Frequently asked 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 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*