# Julianator vs CAISI

The clearest difference is review sentiment: Julianator at 70% against CAISI's 0%. Julianator also leads on rating (4.7 vs 4.1) and update cadence (every 3 months vs every 26 months). CAISI's advantage is price (Free vs $0.99) and iOS requirement (8.4 vs 17.4). On ads, in-app purchases, monetization model and device support there is nothing between them.

CAISI is free to download; Julianator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Julianator holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Julianator has 125 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 70% of Julianator's written reviews are positive against 0% of CAISI's.

Julianator ships an update every 3 months, CAISI every 26 months. The most recent releases landed on November 1, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Julianator | CAISI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.7 (125 ratings)](https://appshunter.io/ios/app/julianator/id383950353/reviews)** | [4.1 (7 ratings)](https://appshunter.io/ios/app/caisi-vsat/id726652583/reviews) |
| Number of ratings | **125** | 7 |
| Positive reviews | **70.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 26 months |
| Monetization | Free | Free |
| Best chart rank | **#188** | — |
| Size | 4 MB | 30 MB |
| Requires iOS | 17.4 | **8.4** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Bright Day Digital LLC](https://appshunter.io/developer/383950356) | [TRADOC Mobile](https://appshunter.io/developer/960437358) |

## What reviewers say

### Julianator

[App page](https://appshunter.io/ios/app/julianator/id383950353)

**Currently charting:** #188 Top Paid · Utilities (US App Store)

Easily convert dates between the Gregorian calendar and the Julian Day of Year (ordinal date). This tool is useful for systems that use day-of-year numbering, such as mainframes, military, and food industries. It offers a clean interface, monthly views, and widgets for quick access.

**Highlights:** Gregorian to Julian Day of Year conversion, Julian Day of Year to Gregorian conversion, Monthly calendar view, Home Screen widgets, Lock Screen widgets, Watch app with complications

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

**In-app purchases:** none


### CAISI

[App page](https://appshunter.io/ios/app/caisi-vsat/id726652583)

This mobile guide provides essential technical and functional information for users of Army automated sustainment systems. It ensures users have the necessary data to effectively interface with communications systems, optimizing sustainment functions.

**Highlights:** Optimize communications system interface, Access technical information, Access functional information, Ensure sustainment function continuity, Information for automated sustainment systems

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

**In-app purchases:** none


## Frequently asked questions

### Is Julianator free?

Julianator costs $0.99, with no in-app purchases.

### Is CAISI free?

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

### Which has better reviews, Julianator or CAISI?

Julianator is rated higher. Julianator averages 4.7 out of 5 from 125 ratings, while CAISI averages 4.1 from 7 ratings.

### Do Julianator or CAISI have ads?

Neither Julianator nor CAISI shows ads.

### Which is updated more often, Julianator or CAISI?

Julianator ships an update every 3 months, and CAISI every 26 months. Most recently, Julianator was updated on November 1, 2026 and CAISI on October 23, 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.*