# Zenther vs Longevity Deck

The clearest difference is rating: Longevity Deck at 4.8 against Zenther's 3.7. Longevity Deck also leads on in-app purchases (none vs 4) and ratings volume (10 vs 3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Zenther sells 4 in-app purchases, starting at $1.59 per 7 days. Longevity Deck asks for nothing beyond the download.

Longevity Deck holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 3 and 10 respectively.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Zenther | Longevity Deck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/zenther-ai-calorie-tracker/id6748252780/reviews) | **[4.8 (10 ratings)](https://appshunter.io/ios/app/longevity-deck/id6753670965/reviews)** |
| Number of ratings | 3 | **10** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 78 MB |
| Requires iOS | 26.0 | **18.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Rudrank Riyam](https://appshunter.io/developer/1479784360) | [HYPE4MOBILE MALEWICZ I WSPOLNICY SPOŁKA JAWNA](https://appshunter.io/developer/501938616) |

## What reviewers say

### Zenther

[App page](https://appshunter.io/ios/app/zenther-ai-calorie-tracker/id6748252780)

Intelligently track workouts, nutrition, and progress with personalized insights. This app prioritizes your privacy by processing all data on your device, offering a secure and user-friendly fitness companion.

**Highlights:** AI-powered fitness tracking, Private on-device data processing, Workout and nutrition logging, Personalized daily targets, Streak tracking and achievements, Home and lock screen widgets, Apple Health and Watch integration

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.59 | per 7 days |
| Monthly | $3.89 | per month |
| Annual | $28.49 | per year |
| Lifetime | $59.99 | one-time |


### Longevity Deck

[App page](https://appshunter.io/ios/app/longevity-deck/id6753670965)

Track over 125 science-backed health protocols, from sauna and cold plunge to sleep optimization and supplements. Get automatic updates based on the latest research and expert recommendations. Prioritizes user privacy with no account or data collection required.

**Highlights:** Track 125+ science-backed protocols, Automatic research updates, Visual timeline tracking, Privacy-focused, no account needed, Optional Apple HealthKit integration, Home screen widgets for key metrics

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

**In-app purchases:** none


## Frequently asked questions

### Is Zenther free?

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

### Is Longevity Deck free?

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

### Which has better reviews, Zenther or Longevity Deck?

Longevity Deck is rated higher. Zenther averages 3.7 out of 5 from 3 ratings, while Longevity Deck averages 4.8 from 10 ratings.

### Do Zenther or Longevity Deck have ads?

Neither Zenther nor Longevity Deck shows ads.

### Which is updated more often, Zenther or Longevity Deck?

Zenther ships an update every 4 days, and Longevity Deck every 4 days. Most recently, Zenther was updated on October 12, 2026 and Longevity Deck on October 13, 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.*