CAISI vs Julian Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Julian Clock
This utility app displays the current Julian Date, time with seconds, military date format, day of the week, and Zulu time (GMT). It's designed for quick access to essential timekeeping information.
- Julian Date display
- Real-time clock with seconds
- Military date format
- Day of the week
- ZULU time (GMT)
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It's as simple as it gets, a Julian date and clock app built for people who need the numbers fast. Julian Clock shows everything you need at a glance: • Julian date (YJJJ or YYDDD, your choice in Settings) • Local time with running seconds • Date in military format (e.g. 19JUN26) • Day of the week • Zulu time (GMT) New in version 2 • Home Screen widgets — small and medium layouts with Julian date, Zulu, and military date • Lock Screen widgets — circular, rectangular, and inline at-a-glance views • Apple Watch app — Julian date and Zulu on your wrist, plus complications • iPad support — universal layout for desk and EFB use • Historical lookup — pick any date on the calendar to get its Julian day • Eight themes — Navy, Air Force, Army, Marines, Coast Guard, Space Force, Dark, and Light Widgets and the Watch app stay in sync with your format and theme choices. This app is for military and DOD personnel who constantly need a quick look at the Julian date and/or Zulu time, on the phone, on the lock screen, on the watch, or on an iPad beside the job.
Screenshots
Verdict
The clearest difference is review sentiment: Julian Clock at 100% against CAISI's 0%. Julian Clock also leads on rating (4.9 vs 4.1) and chart position (#114 vs unranked). CAISI's advantage is price (Free vs $0.99) and update cadence (every 26 months vs every 69 months). On ratings volume, ads, in-app purchases 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; Julian Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Julian Clock holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 7 and 15 respectively. Written reviews point the same way: 0% of CAISI's written reviews are positive against 100% of Julian Clock's.
CAISI ships an update every 26 months, Julian Clock every 69 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | CAISI | Julian Clock |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.1 (7 ratings) | 4.9 (15 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 | 15 — better |
| Update frequency | Every 26 months — better | Every 69 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #114 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 8.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 30 MB | 4 MB |
| Age rating | 9+ | 4+ |
| Developer | TRADOC Mobile | Adam Allard |
Customer experience
CAISI
Julian Clock
In-app purchases
CAISI
No in-app purchases
Julian Clock
No in-app purchases
