BMS vs Zima
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BMS
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BMS Lite is a mobile app for TBB T Series batteries with built-in Bluetooth. It allows users to remotely: 1.Monitor battery status, such as voltage, current, temperature, and other key parameters. 2.Upgrade battery firmware and configuration to the latest version. Connect via Bluetooth to easily monitor and manage your T Series battery anytime, anywhere.
Zima
This comprehensive app provides advanced ballistic calculations for precision shooting, hunting, and reloading. It offers multiple solver models, drag options, and correction factors, with a free tier and a one-time Pro upgrade for extensive features.
- Multiple solver models (3DOF, 4DOF, 6DOF, Pejsa)
- Extensive drag models and correction factors
- Interactive 3D trajectory visualization
- WEZ hit probability analysis
- Reloading suite with ladder tests and inventory tracking
- Workflow hubs for Range Day, Armory, Hunting, and Competition
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The most comprehensive ballistic solver ever built — 200+ features in one app. Independently verified against JBM Ballistics reference data. Four solver models (3DOF, 4DOF, 6DOF, Pejsa), nine drag models, and every correction factor known to ballistic science — validated with a 96-test physics suite. Built for precision shooters, competitive marksmen, hunters, handloaders, and trained professionals who demand accuracy at every distance. FREE FEATURES - Full ballistic calculator with trajectory tables - G1/G7 drag models with atmospheric corrections - Up to 3 rifle profiles with load data - Point blank range, effective range, and basic tools - Quick Solve mode for rapid field calculations - Automatic iCloud Drive backup with one-tap restore (free for everyone, no Pro gate) UPGRADE TO PRO ($19.99 one-time — no subscription) - All four solver models (3DOF, 4DOF, 6DOF, Pejsa) - 3,600+ bullet and cartridge database - Interactive 3D trajectory visualization - WEZ hit probability analysis (Monte Carlo) - PDF range cards, CSV/XLS export, DA Form 5517 - GPS target ranging on real-time maps - Device barometer and camera inclinometer - Bluetooth: Kestrel, rangefinders, chronographs - Competition mode with PAR timer - Night-vision HUD mode - Apple Watch calculator and wind calls - Home Screen widgets and Live Activities - Training modes (range and wind estimation) - TAK/ATAK tactical network integration - DOPE book, cold bore tracking, barrel life - Ammo inventory, suppressor profiles - Reticle simulator with 400+ reticles + DIY reticle creator - And 100+ more tools WORKFLOW HUBS - Range Day — session planner, live shot tracker, trend analysis - Armory — inventory for rifles, optics, mounts, suppressors; maintenance logs, per-optic zero history - Hunting — hunt planner, hunt log, trophy records, GPS scouting - Competition — match planner, live score tracker, stage breakdown, hit-rate trends - Military / LE — mission planner, TAK broadcast, encrypted CoT storage (Pro Acknowledgment required) - Analysis — cross-suite dashboard, predicted vs actual DOPE drift detection - AI Insights — on-device AI via Apple Foundation Models (iOS 26 + iPhone 15 Pro), rule-based fallback on older devices. No data leaves your phone RELOADING SUITE - Develop — ladder tests with R² regression, OCW node detection, optimal-charge markers - Track — per-lot ammo, powder, primer, bullet, brass - Test — chrono session manager, MV statistics (SD, ES, CV), outlier flagging - Records — Saved Load library tying rifle, brass, primer, powder, bullet, OAL/CBTO - Reference — cartridge, brass, primer, powder databases - 24 visibility toggles with 4 layout presets RANGE SCHOOL — LONG-RANGE TRAINING - 61 drills across 6 pillars: Marksmanship, Positions, Wind Reading, Range Estimation, Scope/Optics, Equipment - 290-term searchable glossary, quiz mode with flashcard review - Failure-analysis library: common mistakes diagnosed by symptom - Two training plans: First 30 Days (beginner) + PRS Prep 12-Week BALLISTIC ENGINE - Spin drift, Coriolis, aerodynamic jump, Magnus effect - Gyroscopic stability (Sg), per-load temperature sensitivity - Cant angle correction across all solvers - Transonic/subsonic detection, multi-step BCs - Custom drag curves (CSV, Lapua Doppler), zero-atmosphere BC correction FIELD READY - Offline topo maps with range/bearing HUD - Historical weather auto-fill via WeatherKit - Camera inclinometer, device barometer, GPS auto-fill - Profile QR code sharing PROFESSIONAL USE - TAK/ATAK server integration (CoT, GeoChat) - MGRS coordinate conversion, DA Form 5517 range cards - Anti-materiel reference data, barrier penetration modeling Built by shooters, for shooters. Found a bug? Fixed within 48 hours. Want a feature? Submit it — we WILL build it.
Screenshots
Verdict
The clearest difference is in-app purchases: BMS at none against Zima's 5. BMS also leads on iOS requirement (13.0 vs 18.0). On price, ads 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
Both are free to download. Zima sells 5 one-off in-app purchases. BMS asks for nothing beyond the download.
| Parameter | BMS | Zima |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | — | Every 8 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 36 MB | 213 MB |
| Age rating | 17+ | 4+ |
| Developer | TBB Power Co., Ltd | ZIma Logistics LLC |
In-app purchases
BMS
No in-app purchases
Zima
- Ballistics: Small Tip$0.99
- Ballistics: Medium Tip$2.99
- Ballistics: Large Tip$4.99
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- Ballistics Pro — 6 Months$14.99
- Ballistics Pro$19.99









