# Fastcal vs Fasting Diary

The clearest difference is in-app purchases: Fastcal at none against Fasting Diary's 4. Fasting Diary's advantage is update cadence (fortnightly vs every 5 weeks) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Fasting Diary sells 4 in-app purchases, starting at $0.99 per month. Fastcal asks for nothing beyond the download.

Fastcal ships an update every 5 weeks, Fasting Diary fortnightly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Fastcal | Fasting Diary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 42.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 63 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Thanon Khongcharoensombat](https://appshunter.io/developer/1481479493) | [Dimo Co.,Ltd.](https://appshunter.io/developer/495557603) |

## What reviewers say

### Fastcal

[App page](https://appshunter.io/ios/app/fastcal-ai-calorie-tracker/id1334702443)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fasting Diary

[App page](https://appshunter.io/ios/app/fasting-diary-if-tracker/id6483368664)

This app helps users achieve their weight loss and health goals through intermittent fasting. It provides guidance, motivation, and customizable fasting schedules to support users in burning fat, boosting energy, and improving metabolic health.

**Highlights:** Customizable fasting schedules, Plans for beginners and experts, One-tap start/stop for fasting, Adjustable eating and fasting times, Fasting alerts and reminders

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro monthly | $0.99 | per month |
| Pro 3 months | $1.99 | per 3 months |
| Pro yearly | $2.99 | per year |
| Pro | $2.99 | one-time |


## Frequently asked questions

### Is Fastcal free?

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

### Is Fasting Diary free?

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

### Do Fastcal or Fasting Diary have ads?

Neither Fastcal nor Fasting Diary shows ads.

### Which is updated more often, Fastcal or Fasting Diary?

Fastcal ships an update every 5 weeks, and Fasting Diary fortnightly. Most recently, Fastcal was updated on October 5, 2026 and Fasting Diary on October 15, 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.*