# 1823 vs Marvin's Compound Calculator

The clearest difference is in-app purchases: 1823 at none against Marvin's Compound Calculator's 2. Marvin's Compound Calculator's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Marvin's Compound Calculator sells 2 one-off in-app purchases. 1823 asks for nothing beyond the download.

1823 ships an update every 2 months, Marvin's Compound Calculator every 3 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 1823 | Marvin's Compound Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/1823/id1628731262/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 97 MB | 12 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [1823, HKSAR Government](https://appshunter.io/developer/1628731264) | [Maojian Tang](https://appshunter.io/developer/1006529690) |

## What reviewers say

### 1823

[App page](https://appshunter.io/ios/app/1823/id1628731262)

Submit cases, view records, and get instant answers to government service inquiries. This app allows users to easily submit complaints, compliments, and suggestions to 23 participating departments.

**Highlights:** Submit cases with photos and videos, Track case history and replies, Instant answers via FAQs and chatbot, Submit compliments and suggestions, Contact 23 participating departments

**Features:** Vision Pro support

**In-app purchases:** none


### Marvin's Compound Calculator

[App page](https://appshunter.io/ios/app/marvins-compound-calculator/id6738075583)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marvin的复利计算器-去广告高级版 | $1.99 | one-time |
| Premium Version | $1.99 | one-time |


## Frequently asked questions

### Is 1823 free?

1823 is free to download, with no in-app purchases.

### Is Marvin's Compound Calculator free?

Marvin's Compound Calculator is free to download, with in-app purchases available.

### Do 1823 or Marvin's Compound Calculator have ads?

Neither 1823 nor Marvin's Compound Calculator shows ads.

### Which is updated more often, 1823 or Marvin's Compound Calculator?

1823 ships an update every 2 months, and Marvin's Compound Calculator every 3 days. Most recently, 1823 was updated on November 3, 2026 and Marvin's Compound Calculator on October 30, 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.*