Comparison

iSlipstick RF vs SmartCharger

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

Head to head
About

iSlipstick RF

This app provides a comprehensive suite of calculators and converters specifically designed for radio frequency (RF) engineers and technicians. It includes tools for path loss, antenna gain, intermodulation, and standard electrical calculations, along with various unit conversions.

Highlights
  • RF-specific calculators
  • Standard electrical calculators
  • Unit converters
  • Path loss calculation
  • Intermodulation analysis
  • Antenna gain and beamwidth
Features
Read full description

iSlipstick RF iSlipstick RF contains all of the functionality of the standard iSlipstick plus many functions specifically for RF work. RF Calculators included with iSlipstick RF are: PATH LOSS – Enter all of the RF link parameters such as transmitter output power, antenna gain, cable loss, distance and frequency to find the actual RF level at the receiver. MICROWAVE DISH BEAMWIDTH & GAIN – Enter the dish size, frequency and efficiency to find the 3 dB beamwidth and antenna gain. WAVELENGTH – Metric & U.S. RETURN LOSS / VSWR – Enter forward and reflected power to find VSWR, reflection coefficient and return loss. FRESNEL ZONE – Enter link distance, obstacle distance and frequency to find the 60% and 80% zone radii. This calculator also provides a visual display of ground clearance. VELOCITY FACTOR (VOP) – Enter the dielectric constant of a coax to find the Velocity of Propagation and enter the cable length to find the propagation delay. This calculator can also find the necessary cable length for a given delay and VOP. INTERMODULATION – Enter up to six frequencies to find the 2nd, 3rd, 5th and 7th intermod products that can be created. A 'hit' window can be set to eliminate out of band results. I.F. FREQUENCY – Enter the incoming carrier frequency and 1st local oscillator frequency to find the resulting I.F. and whether the spectrum is inverted or normal. This is a great calculator when working with up/down converters. INTERCEPT POINT – Once you have determined the levels of fundamental and intermodulation tones in a system, you can enter those values into this calculator to find either IP2 or IP3. Standard Calculators included in iSlipstick RF are: OHM'S LAW – Find voltage, current, resistance and power. REACTANCE – Find inductive and capacitive reactance by entering frequency and capacitance or inductance. RESONANCE – Find the resonant frequency of an inductor – capacitor pair. VOLTAGE DIVIDER – Enter the voltage into a resistor divider network to find the output voltage. PARALLEL RESISTOR – Enter up to six resistor values to find the resultant parallel resistance. SERIES and PARALLEL RLC – Enter R, C and L of a series or parallel circuit to find the impedance and phase angle. OP-AMP – Find the gain of either an inverting or non-inverting op-amp circuit. TIME CONSTANT - Find the first 5 time constants of both RC and RL circuits. Standard Converters included in iSlipstick RF are: RESISTOR COLOR CODE – Enter a resistor value to find the color code or enter the color code to find the resistor value. SMD RESISTOR – Enter 3 digit or 4 digit SMD codes to find the resistance value. Also does EIA-96 conversion. VOLTAGE CONVERTER – Convert between RMS, average, peak and p-p values. dB CONVERTER – Convert dBm, dBV, dBW and dBuV to absolute values and vice-versa in 50, 75 and 600 ohm load. TEMPERATURE – Convert between four popular scales. PERIOD – FREQUENCY – Convert waveform period to frequency and vice-versa. LENGTH, AREA, VOLUME, CAPACITY and WEIGHT – Convert from metric to U.S. and vice-versa. Also convert within same standard. A help page is also available as a quick function guide. Tested with iOS 12.0 thru iOS 15.1

About

SmartCharger

Monitor your Apple device's charging and discharging data in real-time. This app connects via Bluetooth to a specific battery charger, offering seamless integration with your portable computing devices.

Highlights
  • Real-time charging/discharging data display
  • Bluetooth communication
  • Integrates with NC2500 Battery Charger
  • Supports iTouch, iPhone, and iPad
Features
Read full description

SmartCharger seamlessly integrates advancements in portable computing with the NC2500 Battery Charger;bringing real-time monitoring to your Apple® devices such as the iTouch, iPhone and iPad. With the Bluetooth communication, the SmartCharger can display your charger’s charging/discharging data.

Screenshots

iSlipstick RF4 screens
SmartCharger4 screens

Verdict

The call

The clearest difference is rating: SmartCharger at 5.0 against iSlipstick RF's 4.7. SmartCharger also leads on iOS requirement (6.0 vs 16.6). iSlipstick RF's advantage is ratings volume (3 vs 1). On price, review sentiment, update cadence and ads 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.

ReceptionRating · Positive reviews · Number of ratings

SmartCharger holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

iSlipstick RF ships an update every 10 months, SmartCharger every 7 months. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
iSlipstick RF versus SmartCharger: the parameters behind the verdict, then further details
ParameteriSlipstick RFSmartCharger
PriceFreeFree
Rating4.7 (3 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 10 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPod — better
Requires iOS16.66.0 — better
Further details — not scored
Size43 MB9 MB
Age rating4+4+
DeveloperSam VirgilloSkyRC Technology Co.,Ltd.

Customer experience

iSlipstick RF

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SmartCharger

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

iSlipstick RF

No in-app purchases

None

SmartCharger

No in-app purchases

Questions

Is iSlipstick RF free?
iSlipstick RF is free to download, with no in-app purchases.
Is SmartCharger free?
SmartCharger is free to download, with no in-app purchases.
Which has better reviews, iSlipstick RF or SmartCharger?
SmartCharger is rated higher. iSlipstick RF averages 4.7 out of 5 from 3 ratings, while SmartCharger averages 5.0 from 1 ratings.
Do iSlipstick RF or SmartCharger have ads?
Neither iSlipstick RF nor SmartCharger shows ads.
Which is updated more often, iSlipstick RF or SmartCharger?
iSlipstick RF ships an update every 10 months, and SmartCharger every 7 months. Most recently, iSlipstick RF was updated on October 16, 2026 and SmartCharger on October 9, 2026.

Other comparisons