DD vs GainBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DD
A private wellness companion for veterans managing PTSD and using cannabis. It offers daily symptom tracking, cannabis session logging, and evidence-based coping tools. All data stays on your device, with no accounts or ads.
- Daily PTSD symptom check-ins
- Cannabis session logging
- Personalized insights and charts
- Evidence-based coping tools
- Tolerance break tracker
- Direct access to Veterans Crisis Line
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DD420 is a private wellness companion for veterans managing PTSD who also use cannabis for symptom relief. No judgment. No politics. Just tools. Your data never leaves your device. No accounts. No ads. No one is watching. DAILY CHECK-IN Track your PTSD symptoms using the same four clusters the VA uses — Intrusion, Avoidance, Mood & Thinking, and Alertness — in a guided, one-step-at-a-time flow built to feel less overwhelming. Rate each area honestly, log your mood and sleep, and note what triggered you. Takes less than two minutes, and your progress saves automatically if you get interrupted. Over time, your check-ins build a picture of how you're actually doing — not how you think you're doing. CANNABIS SESSION LOG Log each session with strain, method, THC and CBD content, timing, and — most importantly — why you used it and whether it helped. Select from 12 veteran-specific conditions including PTSD symptoms, chronic pain, sleep and insomnia, nightmares, anxiety, hyperarousal, and more. Each condition has its own curated list of effects to track. You'll start to see which strains, methods, and dosages actually move the needle for your specific symptoms. INSIGHTS Charts built from your own data. See your symptom severity trend over time, which PTSD clusters affect you most, how sleep quality relates to your symptom scores, how cannabis use correlates with next-day symptoms, and which conditions you use most. The more you log, the clearer the patterns become. COPING TOOLS Evidence-based tools organized by what you need right now. Breathing exercises, grounding techniques, progressive muscle relaxation, sleep visualization, and urge surfing — available any time, no subscription required. TOLERANCE BREAK TRACKER Set a break goal, track your progress day by day, and get coping prompts for cravings. Includes plain-language education on what tolerance is and what to expect during a break. 100% FREE Every feature in DD420 is free. Always. No subscriptions, no locked features, no paywalls. If you want to support development, an optional one-time tip ("Buy Me a Bag") is available in Settings — never required. BUILT FOR VETERANS Veterans Crisis Line: 988, press 1 — call or text directly from the app, one tap, any time. Chat: veteranscrisisline.net DD420 is not affiliated with the VA or DoD. It is not a medical app and does not diagnose or treat any condition. All data is stored on your device only.
GainBook
This workout tracker allows you to plan, log, and review your strength training progress. It offers detailed exercise tracking, customizable workout plans, and an extensive exercise library. All your data is stored locally, ensuring privacy and offline access.
- Workout planning and templating
- Detailed set logging with rest timers
- Extensive exercise library with custom options
- Progress review with volume heatmaps
- Local data storage and iCloud backups
- Offline functionality
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GainBook is a workout tracker built for people who take strength training seriously. Plan your workouts, log every set in the gym, and review your progress over time. There are no ads and no account required. Everything stays on your device. Start in a minute • Answer a few questions and GainBook builds a starting plan for you • Or build your own from scratch, exercise by exercise Plan your workouts • Organize routines into multiple workout plans • Build workout templates with target reps, weight, rest time, and set types (warm-up, working, drop set, failure) • Group exercises into supersets with synchronized sets • See your previous performance while editing or starting a workout • Duplicate templates or update them from completed workouts • Share your plans and history with any AI chat app you choose, then import the improved plan it suggests • Export any plan as JSON, or import one Track every workout • Log reps and weight quickly • Add or remove sets at any time • Automatic rest timer with sounds and notifications • Live workout bar so you can jump back to an active workout from anywhere in the app • Replace or skip exercises if equipment isn't available, and see what you used instead last time • Changed your mind? Undo a skipped exercise • Timed sets with countdown alerts • A reminder if you leave a workout running • Training volume is calculated correctly for dumbbells and single-leg or single-arm exercises Check in with your body • A quick check-in before each workout: pain, soreness, sleep, fatigue, illness and more • Pick from suggestions or add your own, rated 1–5 or yes/no • Dictate your before and after notes instead of typing • Spot patterns: how often each symptom shows up and how its severity trends Exercise library • Hundreds of built-in exercises with instructions, muscle groups, equipment, and images • Search by exercise name, muscle group, or equipment • Create your own custom exercises • View exercise history and see what you did last time Review your progress • Browse completed workouts with duration, volume, and set summaries • Calendar view of your training history • Muscle volume heatmap to see what you've trained • Progress analytics: see which lifts are improving, how hard your sessions feel, and how your effort trends over time • Muscle recovery map: see which muscles are ready to train again, with an optional notification when you're fully recovered • Complete workout breakdown with every set and rest period Your data stays yours • Everything is stored locally • No account or internet connection required • Export and import your complete database for backups • Optional iCloud Drive backups you can restore anytime from Settings Customize the app • Light and dark themes • Supports kg and lb • Choose whether changing an exercise's unit converts your logged weights or just changes the label • Configurable default and maximum rest times Made by someone who actually uses it I built GainBook for myself. I've spent years in the gym and years cycling through tracking apps, and every one of them was missing something I needed: the set types I actually use, supersets that behave, training volume counted correctly for dumbbells and single-side work, a rest timer that stays out of the way. GainBook is all of it in one app: fast, detailed and fully offline, with no cloud account. I train with it every week, and that is why it keeps moving. Whatever I find missing gets built, so expect new features regularly. If you prefer owning your data instead of storing it on someone else's server, that's exactly what GainBook is built for.
Screenshots
Verdict
The clearest difference is in-app purchases: GainBook at none against DD's 3. DD's advantage is update cadence (every 3 days vs every 5 weeks) and ratings volume (14 vs 1). On price, rating, review sentiment and ads 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
Both are free to download. DD sells 3 one-off in-app purchases. GainBook asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for DD against 5.0 for GainBook. That said, the two scores are not equally well evidenced: DD has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
DD ships an update every 3 days, GainBook every 5 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | DD | GainBook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (14 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 14 — better | 1 |
| Update frequency | Every 3 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 20 MB | 59 MB |
| Age rating | 17+ | 4+ |
| Developer | Shawn Wright | Anatolii Vedmid |
Customer experience
DD
GainBook
In-app purchases
DD
- Coffee Tip$2.99
- Lunch Tip$4.99
- Hero Tip$9.99
GainBook
No in-app purchases









