JDK vs Cephalo
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
JDK
Read full descriptionHide full description
Nasce nel settembre 1980 il Jissen Dojo Karate, sulle ceneri del karate Club Abbiategrasso, e da subito si segnala come una ventata di novità nel nel mondo delle arti marziali lombarde, guidato dall'allora l'istruttore Giorgio Rainoldi giovanissimo karateka milanese. Dopo qualche anno di assestamento, 1985 si iscrive alla Federazione che il CONI ha fortemente voluto per dare una casa ad uno sport ancora troppo frammentato in piccole organizzazioni, ed associava il Karate al Judo ed alla Lotta. Iniziava così un percorso formativo federale che ha fortemente caratterizzato la formazione tecnica e culturale del Maestro Giorgio Rainoldi: l'Università , poi i corsi multimediali del CONI e la specializzazione presso la Scuola dello Sport dell'Acquacetosa a Roma. Una formazione permanente e continua culminata nel 2013 con l'acquisizione della qualifica di Allenatore di 4° livello Europeo. In mezzo a tutto la qualifica di formatore dei quadri tecnici federali, responsabile dei rapporti con la scuola e l'università , per sette anni all'Università Cattolica del Sacro Cta di Milano ha tenuto il corso SIS corso specializzazione di post laurea; dal 2015 allenatore della Nazionale Italiana Giovanile, ed anche da questa avventura che continua tuttora sono arrivate soddisfazioni importanti, con la conquista di titoli continentali e mondiali.
Cephalo
Read full descriptionHide full description
Understand your headaches and migraines without giving up your privacy. Cephalo is a headache and migraine diary that keeps every entry on your iPhone, so you can log an attack in seconds and see what your own patterns are telling you. Track the moments that matter: when a headache starts and ends, how intense it feels, symptoms like aura, nausea, and sensitivity to light or sound, the medication you took, and the possible triggers around you. YOUR DATA IS ALWAYS YOURS - FOR FREE Cephalo's free tier never caps your history. Record as many entries as you like, keep your full timeline, and back up everything to a JSON file you control, anytime. Your diary is yours to own. CEPHALO PLUS - SEE THE PATTERNS Upgrade to Plus when you want help making sense of it all: - Doctor-ready PDF report that summarizes your history in clear counts to bring to your appointment - Pattern analysis that highlights what often appears before a difficult day - Highlights of the conditions that have shown up before your harder days in the past - Pattern and insight summaries across weeks and months - Weather and barometric-pressure correlation views - MIDAS disability trends over time - CSV export for your own spreadsheets Plus turns your own history into understanding. It helps you spot patterns and prepare for your doctor - it never diagnoses or treats. JUST NEED A REPORT FOR ONE VISIT? No subscription required - unlock the doctor-ready PDF report for 14 days with a single purchase, and generate as many reports as you need in that window. PRIVACY BY DESIGN - Local-first: your diary lives on your device - Optional iCloud sync that you control - Opt-in, on-device private federated learning, so insights improve without your raw data ever leaving your phone - No ads, no data brokers, no selling your health information MEDICAL DISCLAIMER Cephalo is a tracking and record-keeping tool. It does not provide medical advice and is not intended to diagnose, treat, cure, or prevent any condition. Always consult a qualified healthcare professional about your health. SUBSCRIPTION TERMS Cephalo Plus is available as a monthly or yearly auto-renewing subscription, or a one-time lifetime purchase. Price and currency depend on your region. The yearly subscription includes a 7-day free trial for new subscribers; you are not charged during the trial, and it converts to a paid yearly subscription unless you cancel at least 24 hours before it ends. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and your Apple ID is charged for renewal within 24 hours of the period ending. Manage or cancel anytime in your App Store account settings. The lifetime option is a single purchase with no recurring charge. A one-time 14-day report unlock is also available as a separate purchase that enables doctor-ready PDF report generation for 14 days, with no recurring charge. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Track it. Understand it. Keep it private.
Screenshots
Verdict
The clearest difference is in-app purchases: JDK at none against Cephalo's 2. JDK also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). Cephalo's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 13 months). On price there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Cephalo sells 2 in-app purchases, starting at $2.99 per month. JDK asks for nothing beyond the download.
JDK ships an update every 13 months, Cephalo every 2 weeks. The most recent releases landed on October 27, 2026 and September 29, 2026 respectively.
| Parameter | JDK | Cephalo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 13 months | Every 2 weeks β better |
| Ads | Yes | No β better |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.0 β better | 17.6 |
| Further details β not scored | ||
| Size | 59 MB | 13 MB |
| Age rating | 17+ | 12+ |
| Developer | OVERCLOUDS SRL | Iterica B.V. |
In-app purchases
JDK
No in-app purchases
Cephalo
- Cephalo Plus Monthly$2.991 Month
- Cephalo Plus Yearly7 Days trial$24.991 Year









