Comparison

CS vs WattGuru

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

Head to head
About

CS

Monitor your lithium battery's performance directly from your phone. View key metrics like charge, voltage, and current, along with detailed battery information and settings. Connects via Bluetooth 5.0 for convenient, real-time data access.

Highlights
  • Real-time battery monitoring
  • View State of Charge, Voltage, Current, Power
  • Access detailed battery info (Status, Cycles, Switches)
  • Modify battery name
  • Bluetooth 5.0 connectivity
  • Company contact and website information
Features
Read full description

This is the exclusive CS-BATTERIES Lithium Battery Monitor APP 1) Now you can monitor your battery on your phone directly from the BMS. 2) Displays the connect model of battery,such as Single、Paralleling、Serie And total battery information of the Main page including : State of Charge, Voltage, Current, Power. 3) The "Info" tab include some basic info,Such as Status, Cycles, Charge Switch, Discharge Switch, Temprature, Cell Voltage and so on. 4) The "Parameter" tab include only one param Battery name, and can modify it. 5) The "Mine" tab include the website, email, contact address and the introduce of company. 6) This APP functions through Bluetooth 5.0, Maximum distance of communication on a typical phone is 10 meters (30 feet)

About

WattGuru

Features
Read full description

WattGuru turns your iPhone, iPad and Mac into a practical toolbox for electricity and energy. Calculate values, document meter readings and save calculation cases clearly – without a WattGuru account, advertising or tracking. ELECTRICAL TOOLS - Ohm's law from any two known values - Power and current for DC, single-phase AC and three-phase AC - Cable cross-section, voltage drop and maximum cable length - Energy, runtime, battery charging and consumption costs - Series and parallel resistor networks plus voltage dividers - Conversion of electrical units METERS AND COSTS Record household, sub, appliance, generation and storage meters. Log standard and off-peak readings, follow consumption and costs in charts, and exchange your own data using CSV when needed. PROJECTS AND REFERENCE Save calculator results together with inputs and assumptions in projects. The built-in reference explains voltage, current, power, energy, cables, protective measures and safe measurement in clear language. PRIVATE AND AVAILABLE ACROSS DEVICES Your data stays on your device by default. Optional iCloud sync keeps meters, tariffs and projects in step across your own Apple devices. cgNetsphere does not receive this content. WattGuru includes no advertising, tracking or analytics services. WattGuru is a calculation, planning and documentation aid. Work on electrical installations must be carried out by qualified people. Applicable standards, protective measures and manufacturer instructions always take precedence.

Screenshots

CS3 screens
WattGuru4 screens

Verdict

The call

The clearest difference is in-app purchases: CS at none against WattGuru's 1. CS also leads on iOS requirement (15.0 vs 17.6). WattGuru's advantage is update cadence (fortnightly vs every 5 weeks). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. WattGuru sells 1 one-off in-app purchase. CS asks for nothing beyond the download.

UpkeepUpdate frequency

CS ships an update every 5 weeks, WattGuru fortnightly. The most recent releases landed on November 8, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 5 level
CS versus WattGuru: the parameters behind the verdict, then further details
ParameterCSWattGuru
PriceFreeFree
Positive reviews20.0% of reviews—
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS15.0 — better17.6
Further details — not scored
Size8 MB9 MB
Age rating4+4+
DeveloperForster Individual Batteries GmbHMichael Caklec

In-app purchases

None

CS

No in-app purchases

1 purchases

WattGuru

One-time1
  • WattGuru Full Version$3.99

Questions

Is CS free?
CS is free to download, with no in-app purchases.
Is WattGuru free?
WattGuru is free to download, with in-app purchases available.
Do CS or WattGuru have ads?
Neither CS nor WattGuru shows ads.
Which is updated more often, CS or WattGuru?
CS ships an update every 5 weeks, and WattGuru fortnightly. Most recently, CS was updated on November 8, 2026 and WattGuru on November 4, 2026.

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