DifCal vs CTIA Threat Intelligence Prep
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
DifCal
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Calculate diffraction angles for a particular crystal with a defined orientation matrix. New crystals can be added to the database. Energy/wavelength can be changed. Currently knows about 4-circle, Z-Axis and Theta-Theta diffractometers as well as 2-circle, powder and amorphous diffraction modes. Current crystals include silicon, diamond, GaAs, Muscovite (mica), graphite, many 3-5 and 2-6 crystals. There are separate screens for setting the crystal (or creating a new one), defining the orientation matrix, defining the diffractometer mode, and calculating either angles, given h,k,l, or hkl given a set of angles. With the larger screen of the iPad all the controls are visible on a single page.
CTIA Threat Intelligence Prep
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PASS YOUR CERTIFIED THREAT INTELLIGENCE ANALYST EXAM Master threat intelligence with 500+ exam-focused practice questions that mirror EC-Council's C|TIA certification format. 500+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? Threat Intelligence Analysts earn up to $203K annually (Skillsoft 2024). EC-Council's C|TIA certification validates your ability to collect, analyze, and operationalize threat intelligence that protects organizations from advanced persistent threats. WHAT YOU'LL MASTER: ⢠OSINT, HUMINT, and SIGINT collection techniques ⢠Intelligence lifecycle's six phases from planning to feedback ⢠Strategic, operational, tactical, and technical intelligence levels ⢠STIX 2.1 and TAXII 2.1 protocols for threat sharing ⢠Cyber Kill Chain's seven phases from reconnaissance to actions ⢠MITRE ATT&CK framework with enterprise tactics and techniques ⢠Diamond Model for intrusion analysis ⢠Hypothesis-driven threat hunting methodologies ⢠Analysis of Competing Hypotheses (ACH) and SACH techniques ⢠TLP 2.0 classification protocols (Clear, Green, Amber, Red) ⢠YARA rules for malware identification and detection ⢠Python scripting for threat intelligence automation ⢠Priority Intelligence Requirements (PIRs) and MoSCoW prioritization ⢠SOC integration and intelligence operationalization ⢠Pyramid of Pain for measuring defensive impact STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into threat intelligence expertise. Download now. Pass your exam. Master threat intelligence.
Screenshots
Verdict
The clearest difference is update cadence: CTIA Threat Intelligence Prep at every 4 months against DifCal's every 15 months. DifCal's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DifCal ships an update every 15 months, CTIA Threat Intelligence Prep every 4 months. The most recent releases landed on October 10, 2026 and October 19, 2026 respectively.
| Parameter | DifCal | CTIA Threat Intelligence Prep |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 15 months | Every 4 months ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 ā better | 15.0 |
| Further details ā not scored | ||
| Size | 9 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Sean Brennan | Davy Raitt |
In-app purchases
DifCal
No in-app purchases
CTIA Threat Intelligence Prep
No in-app purchases
Questions
Is DifCal free?
Is CTIA Threat Intelligence Prep free?
Do DifCal or CTIA Threat Intelligence Prep have ads?
Which is updated more often, DifCal or CTIA Threat Intelligence Prep?
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