# ZeroHourLifeCenter vs Progressive Overload

The clearest difference is update cadence: Progressive Overload at every 4 days against ZeroHourLifeCenter's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ZeroHourLifeCenter ships an update monthly, Progressive Overload every 4 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ZeroHourLifeCenter | Progressive Overload |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/progressive-overload-gym-log/id6759585621/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | — | Free |
| Size | 370 MB | 36 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Zero Hour Life Center Inc](https://appshunter.io/developer/1602973511) | [GAVIN PETER OBRIEN](https://appshunter.io/developer/1879668304) |

## What reviewers say

### ZeroHourLifeCenter

[App page](https://appshunter.io/ios/app/zerohourlifecenter/id1602973509)

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

**In-app purchases:** none


### Progressive Overload

[App page](https://appshunter.io/ios/app/progressive-overload-gym-log/id6759585621)

This app automates progressive overload in your workouts. It calculates your estimated one-rep max and provides structured guidance on how to increase weight or reps, removing guesswork and confusion from your training.

**Highlights:** Calculates and tracks estimated 1RM, Guides weight vs. rep increases, Encourages consistent progressive overload, Structured and measurable progression, Removes guesswork from training

**In-app purchases:** none


## Frequently asked questions

### Is ZeroHourLifeCenter free?

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

### Is Progressive Overload free?

Progressive Overload is free to download, with no in-app purchases.

### Do ZeroHourLifeCenter or Progressive Overload have ads?

Neither ZeroHourLifeCenter nor Progressive Overload shows ads.

### Which is updated more often, ZeroHourLifeCenter or Progressive Overload?

ZeroHourLifeCenter ships an update monthly, and Progressive Overload every 4 days. Most recently, ZeroHourLifeCenter was updated on October 30, 2026 and Progressive Overload on October 24, 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.*