Comparison

iSlipstick vs Metis OS

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

Head to head
About

iSlipstick

This app provides a suite of essential electronic formula calculators and unit converters. It simplifies complex calculations for Ohm's law, LC circuits, impedance, and more, with a user-friendly interface for quick input and reordering of frequently used tools.

Highlights
  • Ohm's law calculator
  • Op-Amp gain calculator
  • LC circuit resonance calculator
  • RLC circuit impedance calculator
  • dBm to voltage/power converter
  • Resistor calculator
  • Unit converters (metric/imperial)
Features
Read full description

iSlipstick is a collection of commonly used electronic formula calculators and value converters. Included: Ohm's law calculator Op-Amp gain calculator LC circuit resonate frequency calculator Impedance and phase calculator for both series and parallel RLC circuits Parallel resistance calculator for up to six resistors dBm to voltage and power calculator for 50, 75 and 600 ohm loads Convert dBV to volts, dBW to watts and dBuV to microvolts with the dB converter. This converter will also convert the respective value to dB Resistor Calculator for 4 or 5 band resistors and SMD types Time Constant calculator for R - C and R - L networks. Length, Area, Volume, Capacity and Weight converters to go to and from metric and imperial units and within the same standard. Voltage Converter RMS to Peak and Peak-to-Peak and vice-versa. Features: iSlipstick's unique keyboard makes it easy to enter values without having to jump from one keyboard mode to another Numeric input can be American or European standard Re-orderable tables allow you to put the most frequently used functions where you will find them quickly iSlipstick has been tested on iOS 12.0 thru iOS 15.1

About

Metis OS

Features
Read full description

Whether you're coordinating a rapid response, managing a large-scale event, or conducting day-to-day operations, Metis OS Tactical provides the critical tools you need for real-time situational awareness and effective decision-making.

Screenshots

iSlipstick4 screens
Metis OS4 screens

Verdict

The call

The clearest difference is update cadence: Metis OS at fortnightly against iSlipstick's every 3 months. iSlipstick's advantage is iOS requirement (12.0 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

iSlipstick ships an update every 3 months, Metis OS fortnightly. The most recent releases landed on October 31, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 8 level
iSlipstick versus Metis OS: the parameters behind the verdict, then further details
ParameteriSlipstickMetis OS
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size36 MB1 MB
Age rating4+4+
DeveloperSam VirgilloChristian Daniel Johnson

In-app purchases

None

iSlipstick

No in-app purchases

None

Metis OS

No in-app purchases

Questions

Is iSlipstick free?
iSlipstick is free to download, with no in-app purchases.
Is Metis OS free?
Metis OS is free to download, with no in-app purchases.
Do iSlipstick or Metis OS have ads?
Neither iSlipstick nor Metis OS shows ads.
Which is updated more often, iSlipstick or Metis OS?
iSlipstick ships an update every 3 months, and Metis OS fortnightly. Most recently, iSlipstick was updated on October 31, 2026 and Metis OS on November 8, 2026.

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