# 365 Days Calendar vs Process Expert

The clearest difference is price: Process Expert at Free against 365 Days Calendar's $1.99. Process Expert also leads on update cadence (monthly vs every 2 months) and iOS requirement (13.0 vs 17.6). 365 Days Calendar's advantage is chart position (#186 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Process Expert is free to download; 365 Days Calendar costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

365 Days Calendar ships an update every 2 months, Process Expert monthly. The most recent releases landed on September 7, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 365 Days Calendar | Process Expert |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (26 ratings)](https://appshunter.io/ios/app/365-days-calendar/id6446790328/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Paid | — |
| Best chart rank | **#186** | — |
| Size | 6 MB | 14 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cyberdeploy Inc.](https://appshunter.io/developer/1679092362) | [Anchor 18 Logic, LLC](https://appshunter.io/developer/1592336460) |

## What reviewers say

### 365 Days Calendar

[App page](https://appshunter.io/ios/app/365-days-calendar/id6446790328)

**Currently charting:** #186 Top Paid · Utilities (US App Store)

This utility app converts between Julian and Gregorian dates and tracks Julian Day Numbers. It's designed for users in fields like astronomy, military operations, and historical research who need precise date management for daily operations.

**Highlights:** Julian to Gregorian date conversion, Gregorian to Julian date conversion, Julian Day Number tracking, Historical date reference management, Scientific date reference management, User-friendly interface

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

**In-app purchases:** none


### Process Expert

[App page](https://appshunter.io/ios/app/process-expert/id6738583634)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 365 Days Calendar free?

365 Days Calendar costs $1.99, with no in-app purchases.

### Is Process Expert free?

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

### Do 365 Days Calendar or Process Expert have ads?

Neither 365 Days Calendar nor Process Expert shows ads.

### Which is updated more often, 365 Days Calendar or Process Expert?

365 Days Calendar ships an update every 2 months, and Process Expert monthly. Most recently, 365 Days Calendar was updated on September 7, 2026 and Process Expert on September 10, 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.*