# SL Calendar vs HNB Authenticator

The clearest difference is rating: HNB Authenticator at 5.0 against SL Calendar's 4.5. HNB Authenticator also leads on update cadence (every 2 months vs every 9 months) and iOS requirement (14.0 vs 17.0). SL Calendar's advantage is ratings volume (52 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HNB Authenticator holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: SL Calendar has 52 ratings behind it against 1, so its average is the more settled of the two.

SL Calendar ships an update every 9 months, HNB Authenticator every 2 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SL Calendar | HNB Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (52 ratings)](https://appshunter.io/ios/app/sl-calendar/id1192968779/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hnb-authenticator/id6447000431/reviews)** |
| Number of ratings | **52** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 5 MB | 24 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Charith Gunasekera](https://appshunter.io/developer/1192968778) | [Hatton National Bank](https://appshunter.io/developer/880560643) |

## What reviewers say

### SL Calendar

[App page](https://appshunter.io/ios/app/sl-calendar/id1192968779)

A simple and reliable holiday calendar app for Sri Lanka, offering public, bank, and mercantile holidays. Supports Sinhala, Tamil, and English, with monthly views, reminders, and custom event additions. Ideal for planning around national holidays.

**Highlights:** Sri Lankan public, bank, and mercantile holidays, Monthly calendar view, Multi-language support (Sinhala, Tamil, English), Notifications and reminders, Custom event creation, Apple Watch support, Home screen widgets

**Features:** macOS Compatibility

**In-app purchases:** none


### HNB Authenticator

[App page](https://appshunter.io/ios/app/hnb-authenticator/id6447000431)

This app provides a secure and straightforward method for authenticating sign-ins and transactions. It also allows for offline generation of One-Time Passwords (OTPs) via SMS for mobile data usage.

**Highlights:** Secure authentication, Transaction authentication, Offline OTP generation, SMS-based OTPs, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SL Calendar free?

SL Calendar is free to download, with no in-app purchases.

### Is HNB Authenticator free?

HNB Authenticator is free to download, with no in-app purchases.

### Which has better reviews, SL Calendar or HNB Authenticator?

HNB Authenticator is rated higher. SL Calendar averages 4.5 out of 5 from 52 ratings, while HNB Authenticator averages 5.0 from 1 ratings.

### Do SL Calendar or HNB Authenticator have ads?

Neither SL Calendar nor HNB Authenticator shows ads.

### Which is updated more often, SL Calendar or HNB Authenticator?

SL Calendar ships an update every 9 months, and HNB Authenticator every 2 months. Most recently, SL Calendar was updated on October 3, 2026 and HNB Authenticator on October 12, 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.*