# Gate Authenticator vs Marvin's Compound Calculator

The clearest difference is in-app purchases: Gate Authenticator at none against Marvin's Compound Calculator's 2. Gate Authenticator also leads on iOS requirement (12.0 vs 16.0). Marvin's Compound Calculator's advantage is update cadence (every 3 days vs every 2 months). On price, ads and device support there is nothing between them.

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

Gate Authenticator ships an update every 2 months, Marvin's Compound Calculator every 3 days. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Gate Authenticator | Marvin's Compound Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/gate-authenticator/id1580891116/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 40 MB | 12 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gate Technology Incorporated](https://appshunter.io/developer/1308827631) | [Maojian Tang](https://appshunter.io/developer/1006529690) |

## What reviewers say

### Gate Authenticator

[App page](https://appshunter.io/ios/app/gate-authenticator/id1580891116)

Enhance your account security with this authenticator app. It generates time-based codes for secure logins, withdrawals, and security changes, even offline. Supports multiple accounts and easy setup via QR code.

**Highlights:** Account automatic setup via QR code, Support multi-accounts, Time-based code generation, Offline code generation, Enhanced account security

**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 Gate Authenticator free?

Gate Authenticator 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 Gate Authenticator or Marvin's Compound Calculator have ads?

Neither Gate Authenticator nor Marvin's Compound Calculator shows ads.

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

Gate Authenticator ships an update every 2 months, and Marvin's Compound Calculator every 3 days. Most recently, Gate Authenticator was updated on October 14, 2026 and Marvin's Compound Calculator on October 12, 2026.

---

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