# 100 Day Challenge vs SMI SMAIL

The clearest difference is update cadence: 100 Day Challenge at every 3 months against SMI SMAIL's every 15 months. 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.

100 Day Challenge ships an update every 3 months, SMI SMAIL every 15 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 100 Day Challenge | SMI SMAIL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (17 ratings)](https://appshunter.io/ios/app/100-day-challenge/id468777725/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 69.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 15 months |
| Monetization | Freemium | — |
| Size | 16 MB | 39 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Goals Guy, LLC](https://appshunter.io/developer/399815423) | [PT Sentral Mitra Informatika](https://appshunter.io/developer/1563341476) |

## What reviewers say

### 100 Day Challenge

[App page](https://appshunter.io/ios/app/100-day-challenge/id468777725)

This app provides a system, tools, and growth hacking strategies to transform your life and career in 100 days. It offers a master class in exponential growth, focusing on performance sprints and superior execution strategies to bridge the gap between intentions and results.

**Highlights:** System for exponential growth, Tools and growth hacking strategies, 100-day transformation program, Performance sprint framework, Daily accountability, Superior execution strategies

**Features:** macOS Compatibility

**In-app purchases:** none


### SMI SMAIL

[App page](https://appshunter.io/ios/app/smi-smail/id6444094996)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 100 Day Challenge free?

100 Day Challenge is free to download, with no in-app purchases.

### Is SMI SMAIL free?

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

### Do 100 Day Challenge or SMI SMAIL have ads?

Neither 100 Day Challenge nor SMI SMAIL shows ads.

### Which is updated more often, 100 Day Challenge or SMI SMAIL?

100 Day Challenge ships an update every 3 months, and SMI SMAIL every 15 months. Most recently, 100 Day Challenge was updated on October 23, 2026 and SMI SMAIL on October 27, 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.*