Julianator vs CAISI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Julianator
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.
- 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
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This app converts a date between Julian Day of Year and Gregorian. For example, September 11, 2022 converts to 2022-254 and 2022-254 converts to September 11, 2022. This app will convert both directions. Julian Date for this app refers to the day-of-year number (more properly, the ordinal date) in the Gregorian calendar, often used in mainframe computer systems, the military, and the food industry. (Note: this app does not used the term Julian Date to refer to the astronomy definition which is calculated from 4713 BC) Features a simple clean interface with pickers for the dates. The app also features a monthly view allowing a quick view of both Gregorian and Julian days for the entire month. Widgets are available for both the Home Screen and the Lock Screen to display the current day of year. A Watch app is available that includes a date converter and complications to display the current day of year. Note: The app's icon does not change to reflect the current day. Privacy Policy: https://julianator.brightdaydigital.com/privacy Terms of Service: https://julianator.brightdaydigital.com/terms
CAISI
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.
- Optimize communications system interface
- Access technical information
- Access functional information
- Ensure sustainment function continuity
- Information for automated sustainment systems
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This mobile guide is designed as a tool for the users of the Army sustainment systems to use in order to optimize their interface with the communications system. Without the ability to communicate sustainment functions, even the fastest computer system becomes little more than a paperweight. Therefore the point of this app is to ensure that all Army automated sustainment information systems users have the information (e.g. technical and functional) they need.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 124 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 October 29, 2026 and October 23, 2026 respectively.
| Parameter | Julianator | CAISI |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (124 ratings) — better | 4.1 (7 ratings) |
| Positive reviews | 70.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 124 — better | 7 |
| Update frequency | Every 3 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #173 — better | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.4 | 8.4 — better |
| Further details — not scored | ||
| Size | 4 MB | 30 MB |
| Age rating | 4+ | 9+ |
| Developer | Bright Day Digital LLC | TRADOC Mobile |
Customer experience
Julianator
CAISI
In-app purchases
Julianator
No in-app purchases
CAISI
No in-app purchases
