Comparison

CSL My Base vs StandbyCalc Battery Calculator

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

Head to head
About

CSL My Base

This app assists installers in setting up and maintaining DualCom Pro devices. It helps quickly identify issues and provides proactive customer support. Compatible with DigiAir Pro and GradeShift Pro variants, it allows installers to manage their signaling base.

Highlights
  • Install and Service Wizard
  • Quick issue identification
  • Proactive customer support
  • Supports DualCom Pro devices
  • Manages signaling base
Features
Read full description

The My Base App provides Installers with a handy Install and Service Wizard to set up and maintain DualCom Pro devices. It gives access for Installers to quickly identify issues and proactively support their customers. Compatible with all variants of DigiAir Pro and GradeShift Pro, the App enables Installers to take control of their signalling base.

About

StandbyCalc Battery Calculator

Features
Read full description

StandbyCalc works out the standby battery you need for UK fire and intruder alarm systems in seconds. Enter the quiescent and alarm currents, pick the fire alarm category or the intruder alarm grade, and get the minimum battery capacity in Ah plus the next standard SLA battery size. Add the fitted battery to see whether it's above or below the calculated minimum. Every battery calculation is free. No ads, no tracking, no sign-up and no subscription. FIRE ALARM BATTERY CALCULATION - Based on BS 5839-1 - Categories L, M and P - 24 h standby, or 6 h where a standby generator is fitted - Category P premises left unoccupied: standby periods up to 72 h INTRUDER ALARM STANDBY - Based on BS EN 50131 and BS 9263, Grades 1 to 4 - BS 4737 (legacy systems) for older installations - Standby battery sizing for control panels and remote power supplies PSU AND SLA BATTERY SIZING - Standalone 12 V and 24 V power supplies with your own standby and alarm periods - Minimum Ah with de-rating applied, rounded up to the next standard SLA battery HOW IT WORKS 1. Enter the panel and device currents for standby and alarm 2. Choose the system type, then the category or grade 3. Read off the minimum capacity and the SLA battery to fit 4. Optional: enter the fitted battery to see if it's above or below the calculated minimum The working is shown in full: C = 1.25 x (I1 x T1 + D x I2 x T2) NEW IN 1.0.5 - Fitted battery: enter the fitted Ah and battery date, see whether it's above or below the calculated minimum, and copy a one-line result for your service sheet (free) - Fitted battery line on PDF reports (Pro) - BS 4737 now labelled "BS 4737 (legacy systems)" STANDBYCALC PRO (one-off ยฃ9.99) - Redesigned branded PDF reports with your logo - Full formula working on every report - Save calculations against a site and come back to them later - A clear PDF record of each calculation for your job file Built for UK fire and security installers, engineers and maintainers who need a quick standby battery calculation on site. Always check results against the panel and battery manufacturer's data. From D4N LTD. Support: https://d4n.io/projects/standbycalc/ Independent app, not affiliated with or endorsed by BSI.

Screenshots

CSL My Base4 screens
StandbyCalc Battery Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: CSL My Base at none against StandbyCalc Battery Calculator's 1. CSL My Base also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. StandbyCalc Battery Calculator sells 1 one-off in-app purchase. CSL My Base asks for nothing beyond the download.

UpkeepUpdate frequency

CSL My Base ships an update monthly, StandbyCalc Battery Calculator every 5 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

Scorecard2 real differences ยท 6 level
CSL My Base versus StandbyCalc Battery Calculator: the parameters behind the verdict, then further details
ParameterCSL My BaseStandbyCalc Battery Calculator
PriceFreeFree
Positive reviews83.3% of reviewsโ€”
Update frequencyMonthly โ€” betterEvery 5 weeks
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better17.0
Further details โ€” not scored
Size38 MB3 MB
Age rating4+4+
DeveloperCSL DualComD4N LTD

In-app purchases

None

CSL My Base

No in-app purchases

1 purchases

StandbyCalc Battery Calculator

One-time1
  • StandbyCalc Pro$9.99

Questions

Is CSL My Base free?
CSL My Base is free to download, with no in-app purchases.
Is StandbyCalc Battery Calculator free?
StandbyCalc Battery Calculator is free to download, with in-app purchases available.
Do CSL My Base or StandbyCalc Battery Calculator have ads?
Neither CSL My Base nor StandbyCalc Battery Calculator shows ads.
Which is updated more often, CSL My Base or StandbyCalc Battery Calculator?
CSL My Base ships an update monthly, and StandbyCalc Battery Calculator every 5 weeks. Most recently, CSL My Base was updated on October 20, 2026 and StandbyCalc Battery Calculator on October 24, 2026.

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