Comparison

1823 vs Marvin's Compound Calculator

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

Head to head
About

1823

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
Read full description

1823, managed by the Digital Policy Office of the Government of the Hong Kong Special Administrative Region, handles enquiries, compliments and suggestions for 23 participating departments and receives complaints about any area of Hong Kong Government services. - KEY FEATURES - • Case submission Submit cases with ease using user-friendly forms. You can also upload photos and videos, record a voice message and mark the case location on a map. • Case record and replies View your case history, check replies from the departments, follow up on cases, or inform 1823 to close cases. • Instant answers to simple enquiries Get instant answers from FAQs on 1823 Online through auto-search, or have simple enquiries handled instantly by Chatbot Tammy. Privacy Statement: https://www.1823.gov.hk/en/mobile-app/privacy-policy Personal Information Collection Statement: https://www.1823.gov.hk/en/mobile-app/pics

About

Marvin's Compound Calculator

Features
Read full description

The Compound Interest Calculator is a simple and user-friendly tool designed to calculate the returns on compound interest investments. Users only need to input the initial investment amount, annual interest rate, investment period, and compounding frequency, and the app will automatically calculate the final investment returns. Basic Version Features: Input initial principal, annual interest rate, compounding frequency, and investment duration. Automatically calculate compound interest results and display the final amount. Show detailed growth of interest and principal for each period. Provide clear charts and tables to help users visualize the investment growth process. Premium Features: The Premium Compound Interest Calculator unlocks advanced features tailored for users who want a deeper analysis of investment returns. Premium Version Features: Advanced Calculation Options: Includes more complex calculations, such as various compounding frequencies (e.g., quarterly, monthly) and periodic additional investments. Personalized Themes: Customize the app's appearance with multiple themes and interface styles to enhance the user experience. Whether you’re a casual user or an investment expert, the Compound Interest Calculator provides accurate investment forecasts and a convenient financial management tool. The premium version’s additional features enable users to perform more efficient calculations and enjoy a personalized experience.

Screenshots

18234 screens
Marvin's Compound Calculator4 screens

Verdict

The call

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.

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
1823 versus Marvin's Compound Calculator: the parameters behind the verdict, then further details
Parameter1823Marvin's Compound Calculator
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size97 MB12 MB
Age rating4+4+
Developer1823, HKSAR GovernmentMaojian Tang

In-app purchases

None

1823

No in-app purchases

2 purchases

Marvin's Compound Calculator

One-time2
  • Marvin的复利计算器-去广告高级版$1.99
  • Premium Version$1.99

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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