Comparison

iSlipstick RF vs Flightlogbackup

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

Flightlogbackup

Features
Read full description

Mobile application for Flightlogbackup system Personal Pilot account Use as personal pilot and/or as a pilot connected to a company who also uses Flightlogbackup. - Log all flights - Fully offline capable - Manage Certificates and expirations, attach photo copies and get reminders - Check METAR and TAF in our Weather section - Create groups, get nearby stations based on your location, or free search any station - Detailed statistics and able to dig down nerdy into your logs and data As a company connected pilot you also manage: - Papers required by the company, easy reminders and notes on what to do - Company library function - download offline all documentation you might need - Get Mission data from the company Mission Manager - Mission, Customer and PAX data, all pushed out from the office. - Confirm a flight and mark as completed after the flight - All directly in the app - Duty time - Add and track your company Duty time easy and fast directly in the app Personal Technician account - Track all work performed - Easy set up Organization you work for and Aircraft Groups to track - Make sure you stay compliant with work needed per last 2 years - Easy detailed graphs for compliance and dig down in nerdy details if you want, check how many days you have spent on a specific aircraft or ATA.

Screenshots

iSlipstick RF4 screens
Flightlogbackup4 screens

Verdict

The call

The clearest difference is in-app purchases: iSlipstick RF at none against Flightlogbackup's 4. Flightlogbackup's advantage is update cadence (every 6 weeks vs every 10 months). On price, ads, device support and iOS requirement 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. Flightlogbackup sells 4 in-app purchases, starting at $3.99 per month. iSlipstick RF asks for nothing beyond the download.

UpkeepUpdate frequency

iSlipstick RF ships an update every 10 months, Flightlogbackup every 6 weeks. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

Scorecard2 real differences · 8 level
iSlipstick RF versus Flightlogbackup: the parameters behind the verdict, then further details
ParameteriSlipstick RFFlightlogbackup
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 10 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.616.4 — better
Further details — not scored
Size43 MB86 MB
Age rating4+4+
DeveloperSam VirgilloFlightlogBackup

In-app purchases

None

iSlipstick RF

No in-app purchases

4 purchases

Flightlogbackup

Subscriptions4
  • FLB Technician Premiuim$3.991 Month
  • FLB Technician Premiuim$4.991 Month
  • FLB Technician Premiuim$29.991 Year
Show 1 more
  • FLB Pilot Premium7 Days trial$39.991 Year

Questions

Is iSlipstick RF free?
iSlipstick RF is free to download, with no in-app purchases.
Is Flightlogbackup free?
Flightlogbackup is free to download, with in-app purchases available.
Do iSlipstick RF or Flightlogbackup have ads?
Neither iSlipstick RF nor Flightlogbackup shows ads.
Which is updated more often, iSlipstick RF or Flightlogbackup?
iSlipstick RF ships an update every 10 months, and Flightlogbackup every 6 weeks. Most recently, iSlipstick RF was updated on October 5, 2026 and Flightlogbackup on October 4, 2026.

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