# Delta vs Fitzenia

The clearest difference is rating: Fitzenia at 5.0 against Delta's 4.0. Fitzenia also leads on update cadence (every 3 days vs every 11 days). Delta's advantage is iOS requirement (17.0 vs 27.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Delta sells 1 one-off in-app purchase and Fitzenia sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Fitzenia holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Delta ships an update every 11 days, Fitzenia every 3 days. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Delta | Fitzenia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/delta-tdee-tracker/id6753978074/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fitzenia-ai-calorie-tracker/id6767146607/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 17 MB | 85 MB |
| Requires iOS | **17.0** | 27.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Marcel Timm](https://appshunter.io/developer/1846068948) | [Javier Mejia Corona](https://appshunter.io/developer/1896400462) |

## What reviewers say

### Delta

[App page](https://appshunter.io/ios/app/delta-tdee-tracker/id6753978074)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Delta Unlimited | $2.99 | one-time |


### Fitzenia

[App page](https://appshunter.io/ios/app/fitzenia-ai-calorie-tracker/id6767146607)

This app offers adaptive nutrition tracking for various fitness goals, learning your body's energy needs from your weight and food logs. It provides AI-powered body transformation projections and meal logging through photos, with barcode scanning available for free.

**Highlights:** Adaptive TDEE recalculation, AI body transformation projection, AI meal photo logging, Barcode scanning for nutrition data, Body-first progress tracking, Four-pose progress photos, Phase-based goal setting

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fitzenia Pro Monthly | $4.99 | per month |
| Fitzenia Pro | $34.99 | per year |
| AI Coach Extra Credits | $3.99 | one-time |


## Frequently asked questions

### Is Delta free?

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

### Is Fitzenia free?

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

### Which has better reviews, Delta or Fitzenia?

Fitzenia is rated higher. Delta averages 4.0 out of 5 from 2 ratings, while Fitzenia averages 5.0 from 1 ratings.

### Do Delta or Fitzenia have ads?

Neither Delta nor Fitzenia shows ads.

### Which is updated more often, Delta or Fitzenia?

Delta ships an update every 11 days, and Fitzenia every 3 days. Most recently, Delta was updated on October 24, 2026 and Fitzenia on October 18, 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.*