Comparison

LeafSpy Pro vs DT Smart Battery

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

Head to head
About

LeafSpy Pro

Monitor your Nissan Leaf's battery health, charging history, and vehicle diagnostics. Perform dealer-level functions like changing settings and reading trouble codes. Log data and sync to Dropbox for detailed analysis.

Highlights
  • Cell pair voltage monitoring
  • Battery temperature readings
  • Battery AHr rating and capacity
  • Charging connection history
  • Diagnostic Trouble Code (DTC) reading
  • Tire pressure monitoring
  • Trip and charge logging
Features
Currently charting
Read full description

The Leaf Spy Pro allows anyone with a Nissan Leaf electric vehicle, an iOS 7.1+ device and a supported Bluetooth 4+ LE OBDII adapter (Vgate vLinker FD+ and MC+ OBDII adapters recommended) or a WiFi OBDII adapter, the ability to monitor their battery and other vehicle information normally visible only to the dealer. Support for English, Japanese, German, French, Chinese, Russian and Arabic languages. Note: The iPhone 4 and early iPads (2nd Gen) do NOT support Bluetooth 4+ LE. Currently supports 2011 to 2025 Leaf. (2026 Leaf not yet verified). Information displayed by Leaf Spy Pro: * Voltage of each of the 96 cell pairs (highlighted if shunt active) * Minimum, average, maximum cell pair voltages * Histogram of cell pair voltages * Battery Temperature readings (4 sensors for 2011/12 models, 3 for 2013 models) * Battery AHr rating (this will decease with age and is an indication of remaining capacity) * VIN * Odometer (miles or km) * Number of Quick Charge connections * Number of L1/L2 Charge connections * EVSE Max available amps * EVSE voltage * Battery energy level in GIDs & kWh * Resetable energy usage meter (Wh resolution) * Graphic display of SOC, GIDs and DTE (Distance to Empty) * Remaining distance meter (miles/km) to Event (Low Battery Warning, Very Low Battery Warning or Reserve) based on user selectable energy efficiency * Graphic display of battery temperature with min, avg, max temperatures * Tire Pressure of each of the four tires with low pressure warning and delta pressure warning alarm (not yet supported on 2018 Leaf) * Ambient Temperature * Displays climate control settings and power used. * Trip and Charge Log * Logging function that records most data and optionally GPS location to a csv file that can be easily imported into excel. * Dropbox support to sync Log files * Can run in background while connected to Leaf allowing you to use other apps. LeafSpy Pro also gives you the ability to perform functions normally requiring a visit to the dealer. * Change automatic door lock/unlock settings * Change VSP sound settings on 2013 to 2017 Leaf * Change Dash language on 2011 to 2017 Leaf * Read Diagnostic Trouble Codes (DTC) * Register Tire Positions (required after tire rotation or seasonal tire changes so your Leaf knows the correct location of each tire on the car) * Ability to reset DTCs from selected ECUs (including the DTC set when a different battery pack is installed.) * Special modes when only parts of a Leaf are used in a custom vehicle. Ability to create custom screens by creating a CSV file. See help file for definition format.

About

DT Smart Battery

Monitor your smart battery pack's performance and status remotely via Bluetooth. View real-time data like voltage, current, temperature, and remaining power. Receive alerts for critical conditions and set custom reminders.

Highlights
  • Real-time battery status monitoring
  • Voltage, current, and temperature readings
  • Remaining power percentage
  • Protection information alerts
  • Individual cell voltage monitoring
  • Customizable power and temperature reminders
Features
Read full description

The smart battery pack has a built-in remote Bluetooth module, and the APP can read the following information by connecting the APP with the mobile phone through Bluetooth: 1. Working status of battery pack: charging point, discharge, working voltage, current, temperature, residual power, etc.; 2. Overvoltage, undervoltage, overcurrent, overtemperature and other protection information; 3. The number of strings of cells, the voltage and release of each cell; 4. Hardware short circuit and delay, equalization opening voltage; 5. Set the threshold of the remaining power and temperature reminder, and receive a reminder below the value of the fixed threshold;

Screenshots

LeafSpy Pro4 screens
DT Smart Battery4 screens

Verdict

The call

The clearest difference is review sentiment: LeafSpy Pro at 46% against DT Smart Battery's 0%. LeafSpy Pro also leads on rating (3.5 vs 1.5) and ratings volume (115 vs 8). DT Smart Battery's advantage is price (Free vs $19.99) and iOS requirement (11.0 vs 16.0). On update cadence, 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

DT Smart Battery is free to download; LeafSpy Pro costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

LeafSpy Pro holds the better App Store score, 3.5 against 1.5. That said, the two scores are not equally well evidenced: LeafSpy Pro has 115 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 46% of LeafSpy Pro's written reviews are positive against 0% of DT Smart Battery's.

UpkeepUpdate frequency

LeafSpy Pro ships an update every 2 months, DT Smart Battery every 3 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 4 level
LeafSpy Pro versus DT Smart Battery: the parameters behind the verdict, then further details
ParameterLeafSpy ProDT Smart Battery
Price$19.99Free — better
Rating3.5 (115 ratings) — better1.5 (8 ratings)
Positive reviews45.7% of reviews — better0.0% of reviews
Number of ratings115 — better8
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#11 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.011.0 — better
Further details — not scored
Size13 MB28 MB
Age rating4+4+
DeveloperJames Pollock应刚 郑

Customer experience

LeafSpy Pro

All ratings114 ratings
Positive62.3%
Neutral5.3%
Negative32.5%
Written reviews173 reviews
Positive45.7%
Neutral9.2%
Negative45.1%

DT Smart Battery

All ratings7 ratings
Positive14.3%
Neutral0.0%
Negative85.7%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

LeafSpy Pro

Reported bugs

5 issues
  • Doesn't connect via Bluetooth on iOS
  • Crashes on startup after iOS updates
  • Fails to load data despite being connected
  • Doesn't work with Mini OBD2 scanners
  • Can't change sounds on newer Leaf models

Requested features

5 requests
  • Add support for newer Leaf models
  • Improve user interface and design
  • Add Apple CarPlay integration
  • Expand compatibility with more OBD2 dongles
  • Improve documentation and in-app help

DT Smart Battery

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LeafSpy Pro

No in-app purchases

None

DT Smart Battery

No in-app purchases

Questions

Is LeafSpy Pro free?
LeafSpy Pro costs $19.99, with no in-app purchases.
Is DT Smart Battery free?
DT Smart Battery is free to download, with no in-app purchases.
Which has better reviews, LeafSpy Pro or DT Smart Battery?
LeafSpy Pro is rated higher. LeafSpy Pro averages 3.5 out of 5 from 115 ratings, while DT Smart Battery averages 1.5 from 8 ratings.
Do LeafSpy Pro or DT Smart Battery have ads?
Neither LeafSpy Pro nor DT Smart Battery shows ads.
Which is updated more often, LeafSpy Pro or DT Smart Battery?
LeafSpy Pro ships an update every 2 months, and DT Smart Battery every 3 months. Most recently, LeafSpy Pro was updated on October 29, 2026 and DT Smart Battery on October 24, 2026.

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