Comparison

BT1 Tester vs WELT

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

Head to head
About

BT1 Tester

This utility app tests 12V car batteries, providing results on their condition, such as good, bad, or needing replacement. It displays the battery's voltage, volume, and overall health.

Highlights
  • Tests 12V car battery voltage
  • Measures battery volume
  • Assesses battery health
  • Displays test results (good, bad, replace)
Read full description

To test 12V car battery's voltage,volume,health,and then show the testing result on good,bad,replace...

About

WELT

Read full description

WELT-010 Wireless Electrical Tester / Analyzer The WELT-010, Bluetooth Low Energy Wireless Electrical Tester/Analyzer is designed to inspect and analyze wiring compliance to electrical code such as voltage drop under different load, find problem with splices, wiring connections and conductor quality based on impedance analysis. Connection and wire impedance is calculated based on voltage drop and real current value which is measured during voltage drop test. Also, The WELT-010 is able to perform electrical socket wiring connection verification (incorrect wiring), AFCI test (series), 30mA ground test, standard GFCI test, measure AC voltage and current. All of mentioned parameters directly influence to safety and performance of the electrical system. WELT-010 use iPhone or iPad as command and display unit that give new flexible functional opportunity. Main Functions Measuring Voltages (line to neutral, line to ground and neutral to ground) Measuring external RMS current and power. Verifies wires connections on the electrical socket (incorrect wiring). Measuring voltage drop under different load (5A, 10A, 15A and 20A) with measuring of real load current (without trip circuit breakers or blow fuses during tests). Real impedance calculation and indication based on measured load current GFCI test AFCI Series test 30mA ground test

Screenshots

BT1 Tester3 screens
WELT3 screens

Verdict

The call

The clearest difference is update cadence: BT1 Tester at every 5 weeks against WELT's every 17 months. BT1 Tester also leads on iOS requirement (7.0 vs 16.0). 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

BT1 Tester ships an update every 5 weeks, WELT every 17 months. Both last shipped on November 11, 2026.

Scorecard2 real differences · 8 level
BT1 Tester versus WELT: the parameters behind the verdict, then further details
ParameterBT1 TesterWELT
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 5 weeks — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS7.0 — better16.0
Further details — not scored
Size7 MB1 MB
Age rating4+4+
DeveloperShenzhen Leagend Optoelectronics Co., Ltd.Nikolay Nikitin

In-app purchases

None

BT1 Tester

No in-app purchases

None

WELT

No in-app purchases

Questions

Is BT1 Tester free?
BT1 Tester is free to download, with no in-app purchases.
Is WELT free?
WELT is free to download, with no in-app purchases.
Do BT1 Tester or WELT have ads?
Neither BT1 Tester nor WELT shows ads.
Which is updated more often, BT1 Tester or WELT?
BT1 Tester ships an update every 5 weeks, and WELT every 17 months. Most recently, BT1 Tester was updated on November 11, 2026 and WELT on November 11, 2026.

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