Basic Strategy vs DiveKeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Basic Strategy
This app acts as your personal Blackjack coach, providing instant, statistically optimal moves based on your hand and the dealer's upcard. Customize game rules and even utilize a card counting mode to play smarter and with more confidence.
- Instant basic strategy advice
- Customizable game rules
- Card counting mode
- Offline availability
- Simple interface
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Stop Guessing at the Blackjack Table! Play Smarter, Not Harder. Ever felt that knot in your stomach at the Blackjack table? Staring at your hand, the dealer's upcard... Hit? Stand? Double Down? The pressure is real, and one wrong move can cost you. Introducing Basic Strategy: Blackjack, your personal Blackjack Basic Strategy coach, designed to give you the confidence to make the statistically best decision, every single time. Picture this: You are playing Blackjack, you've got a tricky hand like a 16 against a dealer's 10, and you don’t know what you should do. Do you risk busting or hope the dealer busts? Forget the gut feelings and anxiety! With Basic Strategy: Blackjack, instantly know the optimal Basic Strategy move recommended by probability professionals. Turn uncertainty into calculated confidence and approach the table like a seasoned player. Features: ● Instant Basic Strategy Advice: Input the cards dealt to you and the dealer's up card and the app will tell you the exact move to do to have the highest chance of winning. ● Game Customization: Adjust the app to take into consideration the rules of YOUR Blackjack game, enabling/disabling surrender, double after split or whether the dealer has to hit or stand on a soft 17. ● Card Counting Mode: Count cards the easy way without having to memorize anything. Just log the cards and the suggestions will update based on the count. (Premium Feature) ● Offline availability: Access all the functionality of the app offline without any compromises ● Ease of use: Simplicity over complexity. You can start using the app right away without needing much setup. This app provides blackjack strategy advice based on standard basic strategy charts. It is intended for educational and entertainment purposes only. The app does not guarantee success or winnings. Use of this app is at your own risk. The developer is not responsible for any financial losses incurred.
DiveKeep
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Keep your gear in safe condition, always. "When did I last overhaul this regulator?" Your life-support gear deserves better — let DiveKeep handle your care timing. ■ Dual tracking: dives x time Overhaul "in N dives," BCD service and battery changes "in N days." Log a dive and it updates your total dives, so count-based care is spot on. ■ Never forget the post-dive rinse Gear used in the sea needs a freshwater rinse. Mark gear as "used in saltwater" and get reminded to rinse after every dive — protecting it from salt jams and corrosion. ■ Track your tank inspections Get reminders for safety-related checks like visual inspection (VIP, yearly) and hydro testing (every 5 years). ■ Preset care items Post-dive rinse, regulator overhaul, O-ring check, BCD service, computer battery change, hose check, tank visual inspection, tank hydro test, wetsuit care, fin & mask care, full rinse — in real diver language, with recommended intervals you can fully customize. ■ A collection with a care log Register regulators and BCDs with photos. Every care builds your history, and you can record costs too. ■ Three-stage reminders A heads-up as it approaches, on the day, and gently every day after until it's done. Faulty gear leads to accidents. Never miss it. ■ Tips for divers Fit the dust cap before rinsing, O-rings are consumables, follow regulations for tank inspections — 24 tips and a buddy turtle make care more fun. ■ Widget support See which gear needs care next and what's left (in dives or days) at a glance on your Home Screen. [Free] • Register 1 piece of gear • Up to 3 care items • Care reminders [Premium] • Unlimited gear • Unlimited care items • Full history & dive log • Group by storage • No ads One-time $20 or $1.49/week (no free trial). Subscriptions auto-renew and are billed to your Apple ID unless canceled at least 24 hours before the period ends. Cancel anytime in Settings. Care intervals are general guides. Adjust them to your gear and diving style, and always follow the guidance of certified service centers and dive agencies for inspection and service. ■ LINKS • Support: https://tsuzukit.com/contact/ • Terms of Service: https://tsuzukit.com/legal/terms-of-service.html • Privacy Policy: https://tsuzukit.com/legal/privacy-policy.html
Screenshots
Verdict
The clearest difference is ads: Basic Strategy at none against DiveKeep's shown. Basic Strategy also leads on update cadence (every 5 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement 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. Basic Strategy sells 1 one-off in-app purchase and DiveKeep sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Basic Strategy ships an update every 5 weeks, DiveKeep every 3 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Basic Strategy | DiveKeep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Parey | Ryo Tsudukihashi |
In-app purchases
Basic Strategy
- Card Counting Mode$3.99
DiveKeep
- Premium (Weekly)$0.997 Days
- Premium (Lifetime)$19.99









