# Authenticator App vs Invoice Maker・Simple Receipt

The clearest difference is review sentiment: Invoice Maker・Simple Receipt at 100% against Authenticator App's 0%. Authenticator App's advantage is rating (4.5 vs 4.0) and update cadence (monthly vs every 11 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $4.99 per 7 days and Invoice Maker・Simple Receipt sells 4 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator App holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Authenticator App has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 0% of Authenticator App's written reviews are positive against 100% of Invoice Maker・Simple Receipt's, so the app with the better star average is not the one people write more warmly about.

Authenticator App ships an update monthly, Invoice Maker・Simple Receipt every 11 months. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Authenticator App | Invoice Maker・Simple Receipt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (24 ratings)](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/invoice-makersimple-receipt/id6479700370/reviews) |
| Number of ratings | **24** | 4 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 11 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 101 MB | 29 MB |
| Requires iOS | **15.0** | 18 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Apperture Limited](https://appshunter.io/developer/1727867515) | [Mateusz Kowalski](https://appshunter.io/developer/1869406834) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300)

Enhance digital security with a multi-factor authenticator app. It provides an extra layer of protection for sensitive accounts and information, working offline for reliable access. Protect email, social media, financial accounts, and more with this user-friendly solution.

**Highlights:** Multi-factor authentication, Offline 2FA code generation, Wide service integration, User-friendly interface, Enhanced account protection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $7.99 | per 7 days |
| Pro Version | $14.99 | per month |
| Pro Version | $39.99 | per year |


### Invoice Maker・Simple Receipt

[App page](https://appshunter.io/ios/app/invoice-makersimple-receipt/id6479700370)

Create, manage, and send professional invoices and receipts quickly. Save client details, track payments, and generate financial reports. Ideal for freelancers and small businesses to simplify billing and get paid faster.

**Highlights:** Create customizable invoices and receipts, Save client information, Support for multiple currencies and taxes, Export and share documents, Track payment status and history, Generate professional financial reports

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Take control of your finances | $5.99 | per 7 days |
| Simplify your financial life | $5.99 | per 7 days |
| Upgrade your financial toolkit | $19.99 | per month |
| Simplify your financial life | $39.99 | per year |


## Frequently asked questions

### Is Authenticator App free?

Authenticator App is free to download, with in-app purchases available.

### Is Invoice Maker・Simple Receipt free?

Invoice Maker・Simple Receipt is free to download, with in-app purchases available.

### Which has better reviews, Authenticator App or Invoice Maker・Simple Receipt?

Authenticator App is rated higher. Authenticator App averages 4.5 out of 5 from 24 ratings, while Invoice Maker・Simple Receipt averages 4.0 from 4 ratings.

### Do Authenticator App or Invoice Maker・Simple Receipt have ads?

Neither Authenticator App nor Invoice Maker・Simple Receipt shows ads.

### Which is updated more often, Authenticator App or Invoice Maker・Simple Receipt?

Authenticator App ships an update monthly, and Invoice Maker・Simple Receipt every 11 months. Most recently, Authenticator App was updated on October 15, 2026 and Invoice Maker・Simple Receipt on October 16, 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.*