# DEFICIT vs Flux

The clearest difference is device support: DEFICIT at 3 against Flux's 1. DEFICIT also leads on iOS requirement (17.6 vs 26.2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DEFICIT sells 3 in-app purchases, starting at $4.99 per month and Flux sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

DEFICIT ships an update every 10 days, Flux weekly. The most recent releases landed on October 28, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | DEFICIT | Flux |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flux-workout-tracker/id6758521633/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Freemium |
| Size | 21 MB | 47 MB |
| Requires iOS | **17.6** | 26.2 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Stupid Human Ltd](https://appshunter.io/developer/1485876481) | [Digital Flux Ltd](https://appshunter.io/developer/1873322568) |

## What reviewers say

### DEFICIT

[App page](https://appshunter.io/ios/app/deficit/id6757392943)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $34.99 | per year |
| Lifetime | $99.99 | per year |


### Flux

[App page](https://appshunter.io/ios/app/flux-workout-tracker/id6758521633)

This app helps you train smarter by generating personalized workouts based on your goals, available equipment, and time. It uniquely adapts to your progress over time, keeping all your data on your device for privacy. Track every set, rep, and weight with ease, and benefit from advanced features like progressive overload and fatigue-aware training.

**Highlights:** Personalized workout generation, Customizable routines and exercises, Real-time adaptive changes, Progressive overload and periodisation, Fatigue-aware training support, Apple Health integration, Data export

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flux Pro : 1 Month | $2.99 | per month |
| Flux Pro : 12 Month | $19.99 | per year |
| Flux Pro : Lifetime Pass - Founder | $49.99 | one-time |
| Flux Pro : Lifetime Pass | $59.99 | one-time |


## Frequently asked questions

### Is DEFICIT free?

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

### Is Flux free?

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

### Do DEFICIT or Flux have ads?

Neither DEFICIT nor Flux shows ads.

### Which is updated more often, DEFICIT or Flux?

DEFICIT ships an update every 10 days, and Flux weekly. Most recently, DEFICIT was updated on October 28, 2026 and Flux on October 21, 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.*