E6B vs ZenDriver Coach
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E6B
This app provides a comprehensive suite of aviation calculations for pilots, including weather, preflight planning, in-flight adjustments, and weight and balance computations. It also offers a wide range of unit conversions for aviation-related metrics.
- Weather calculations (pressure/density altitude, crosswind)
- Preflight planning (airspeed, heading, fuel)
- In-flight calculations (true airspeed, altitude, groundspeed)
- Weight and balance with custom aircraft profiles
- Extensive unit conversions
- Time math (add/subtract times)
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E6B is a modern flight computer for iPhone and iPad — built for student E6B is a modern flight computer for iPhone and iPad — built for student pilots, instrument candidates, and working aviators who need fast, accurate calculations without fumbling with a physical whiz wheel. WEATHER • Pressure & Density Altitude — from baro setting, OAT, and field elevation • Crosswind, Headwind & Tailwind — enter wind speed, direction, and runway heading • Cloud Base & Freezing Level — AGL and pressure altitude • Hydroplane Speed PREFLIGHT • Planned True Airspeed — from CAS, pressure altitude, and OAT • Required CAS / Required TAS — reverse-solve airspeed equations • Heading & Groundspeed — full wind triangle solution • Compass Heading — with magnetic variation and compass deviation • Leg Time — solve any one of time, speed, or distance • Fuel Required & Endurance • Planned Mach Number • Time Math — add and subtract times in HH:MM:SS IN-FLIGHT • Actual True Airspeed — from CAS, altitude, and OAT • Actual True Altitude — corrected for non-standard temperature • Groundspeed — from elapsed time and distance • Fuel Per Hour — from fuel used and elapsed time • Distance Flown WEIGHT & BALANCE Build custom aircraft profiles with stations, limits, and CG envelopes. Load passengers, fuel, and cargo — E6B calculates total weight, moment, and CG in real time. Save multiple profiles for different aircraft. CONVERSIONS Bidirectional converters for: NM ↔ SM ↔ km, feet ↔ meters, °C ↔ °F, inHg ↔ mb, lbs ↔ kg, US gallons ↔ liters, HH:MM:SS ↔ decimal hours, Avgas and Jet A weight (gallons or liters to pounds), and minimum climb gradient to percent or degrees. Privacy Policy: https://docs.nikitin.fyi/com.e6b.calculator/privacy-policy.html Terms of Service: https://docs.nikitin.fyi/com.e6b.calculator/terms-of-service.html
ZenDriver Coach
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Become a better driver. ZenDriver Coach turns every trip into a private coaching session — quietly analyzing your ride in the background and giving each drive one honest Carefulness Score from 0 to 10. Instead of a vague "good" or "bad," it weighs dozens of signals from your motion and GPS into a single clear number, so you can see over time whether you're truly improving. Whether you just got your licence, you're preparing for a driving test, or you've driven for years and want an honest mirror, it's objective feedback without judgment or nagging — just mount your phone, tap Start, and drive. You get a Carefulness Score for every trip, real-time feedback as you drive, route replay on a native map with key moments highlighted, and trend tracking to watch yourself improve over weeks and months. It works with any car — no OBD adapter, no Bluetooth, no setup — records offline, and supports Apple CarPlay for an at-a-glance view on your car's display. Anonymous by default: no account, name, or email required. Your first 3 drives are free; ZenDriver Pro unlocks unlimited tracking, and subscriptions can be managed any time in Settings → Apple ID → Subscriptions. ZenDriver Coach is an informational tool, not a driver-assistance system — set it up before you drive and keep your eyes on the road. Privacy Policy: https://zendriver.app/privacy Terms of Service: https://zendriver.app/terms Support: https://zendriver.app/support
Screenshots
Verdict
E6B and ZenDriver Coach are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. E6B sells 2 in-app purchases, starting at $4.99 per month and ZenDriver Coach sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | E6B | ZenDriver Coach |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | — |
| Number of ratings | 7 — better | — |
| Update frequency | — | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 26 MB | 50 MB |
| Age rating | 4+ | 17+ |
| Developer | Mikhail Nikitin | Evgenii Zhulkov |
In-app purchases
E6B
- premium$4.991 Month
- premium7 Days trial$29.991 Year
ZenDriver Coach
- Monthly subscription$4.991 Month
- Annual subscription$39.991 Year
- Lifetime payment$79.99






