# SOTP Authenticator vs Tip Zombie

The clearest difference is in-app purchases: Tip Zombie at none against SOTP Authenticator's 2. Tip Zombie also leads on update cadence (every 2 weeks vs every 5 months). SOTP Authenticator's advantage is iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. SOTP Authenticator sells 2 one-off in-app purchases. Tip Zombie asks for nothing beyond the download.

SOTP Authenticator ships an update every 5 months, Tip Zombie every 2 weeks. The most recent releases landed on September 16, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | SOTP Authenticator | Tip Zombie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tip-zombie/id6760268550/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 20 MB | 61 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anzhela Baroyan](https://appshunter.io/developer/1526016553) | [Zombie Platforms LLC](https://appshunter.io/developer/1882441097) |

## What reviewers say

### SOTP Authenticator

[App page](https://appshunter.io/ios/app/sotp-authenticator/id1526068202)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One dollar donation | $0.99 | one-time |
| Five dollar donation | $4.99 | one-time |


### Tip Zombie

[App page](https://appshunter.io/ios/app/tip-zombie/id6760268550)

This app helps you confidently calculate tips worldwide, offering location-aware guidance for over 100 countries. It provides service-specific recommendations and handles various currencies and tipping modes.

**Highlights:** Location-aware tipping guidance for 100+ countries, Service-specific tipping recommendations, Supports percentage, flat rate, optional, and no-tip modes, Handles standard, zero-decimal, and three-decimal currencies, Flexible calculation options, Built-in Tip Guide with cultural context, Private by design, no account or data collection

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

**In-app purchases:** none


## Frequently asked questions

### Is SOTP Authenticator free?

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

### Is Tip Zombie free?

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

### Do SOTP Authenticator or Tip Zombie have ads?

Neither SOTP Authenticator nor Tip Zombie shows ads.

### Which is updated more often, SOTP Authenticator or Tip Zombie?

SOTP Authenticator ships an update every 5 months, and Tip Zombie every 2 weeks. Most recently, SOTP Authenticator was updated on September 16, 2026 and Tip Zombie on September 19, 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.*