Comparison

Charge Key vs Location Tax Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Charge Key

This app allows you to unlock, lock, and start your vehicle using your phone. It offers hands-free unlocking when you approach your car and can navigate you to its location if you've misplaced it. The platform prioritizes user privacy by not storing personal information.

Highlights
  • Unlock vehicle
  • Lock vehicle
  • Start vehicle
  • Hands-free unlock
  • Navigate to vehicle location
  • Privacy focused
Features
Read full description

Access and charge your vehicle with Charge Key. Charge Key is a platform designed to easily unlock, lock, and start your vehicle. Setup hands-free unlock to simply approach the vehicle to unlock and begin driving. Don’t remember where your vehicle is? Open Charge Key to navigate to the vehicle’s location. Before your access has expired, verify you have collected all of your belongings! Privacy: • Charge Key does not store information that is linked to you. • Charge Key doesn't need to be open on your phone — data comes directly from the vehicle. • Charge Key works wherever in the world you drive. Charge Key was made by Tesla enthusiasts and is not endorsed by Tesla, Inc in any way. Terms & Conditions: https://www.chargekey.app/terms-conditions Privacy Policy: https://www.chargekey.app/privacy-policy

About

Location Tax Tracker

Features
Read full description

TaxTrack builds a private, time-stamped record of where you have been — so you can defend your tax-residency status with evidence, not memory. Designed for Puerto Rico Act 60 residents, California non-residents under FTB §17014 audit risk, and anyone tracking IRS Substantial Presence Test thresholds, TaxTrack captures your location every six hours, classifies each capture against bundled jurisdiction polygons offline, and hash-chains the result so the record can be verified later. EVIDENCE SOURCES • Six-hour location captures on UTC boundaries • Photo metadata import (GPS + timestamps; pixels never read) • Flight events synced from the Flighty calendar • Manual corroboration notes for unverified days OFFLINE JURISDICTION CLASSIFICATION TaxTrack ships with Natural Earth admin-0 and admin-1 polygon data and the evansiroky timezone-boundary dataset. Every capture is classified without a network call. We never use Apple's online geocoder for classification — only for human-readable address hints. HASH CHAIN INTEGRITY Each capture is SHA-256 hashed into a chain against the prior record. Tampering, reordering, or deletion is detectable. The chain is mirrored to your iCloud private database and verifiable from the app or from exported data. CALENDAR-AWARE FLIGHT EVIDENCE TaxTrack reads calendar events synced by Flighty (only those — every other event is ignored), extracts departure and arrival airports, classifies each endpoint, and optionally fills inferred gap days between flights with an audit-readable "inferred" flag. Calendar events are never modified. EXPORT FOR AUDIT Settings → Export package produces a folder containing CSV, JSON, a human-readable hash chain, and a monthly-map PDF. AirDrop it to your accountant, your attorney, or an auditor. THREE-YEAR PR ROLLING COUNTER The app tracks year-to-date Puerto Rico day counts and the three-year rolling total used in the Substantial Presence Test, plus California day counts and the §1.937 30-day international allowance. PRIVACY-FIRST TaxTrack has no server. Your data lives on your device and (optionally) in your own iCloud private database that only you can access. No analytics, no telemetry, no third-party SDKs, no ads. Photo pixels are never read. WHAT THIS APP IS NOT TaxTrack is not legal or tax advice. The records it produces are supporting material. Talk to a licensed attorney or CPA for any residency question. The app is a personal-use audit-trail tool. REQUIREMENTS • iOS 17 or later • "Always" location access for background captures • Optional: iCloud sync, photo library access, calendar access • Optional: Sign in with Apple (for multi-device sync identity)

Screenshots

Charge Key3 screens
Location Tax Tracker4 screens

Verdict

The call

The clearest difference is update cadence: Location Tax Tracker at daily against Charge Key's fortnightly. On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Charge Key ships an update fortnightly, Location Tax Tracker daily. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
Charge Key versus Location Tax Tracker: the parameters behind the verdict, then further details
ParameterCharge KeyLocation Tax Tracker
PriceFreeFree
Rating3.7 (33 ratings) — better—
Positive reviews46.2% of reviews—
Number of ratings33 — better—
Update frequencyFortnightlyDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size24 MB13 MB
Age rating17+4+
DeveloperChargeKey, LLCJUAN PABLO ORTEGA

In-app purchases

None

Charge Key

No in-app purchases

None

Location Tax Tracker

No in-app purchases

Questions

Is Charge Key free?
Charge Key is free to download, with no in-app purchases.
Is Location Tax Tracker free?
Location Tax Tracker is free to download, with no in-app purchases.
Do Charge Key or Location Tax Tracker have ads?
Neither Charge Key nor Location Tax Tracker shows ads.
Which is updated more often, Charge Key or Location Tax Tracker?
Charge Key ships an update fortnightly, and Location Tax Tracker daily. Most recently, Charge Key was updated on November 8, 2026 and Location Tax Tracker on October 31, 2026.

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