Comparison

OhmKit vs Altimeter + Barometermeter

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

Head to head
About

OhmKit

Features
Read full description

OhmKit is a resistor calculator and electronics toolkit designed for engineers, technicians, students, makers, and electronics enthusiasts. Decode resistor color codes and SMD markings, calculate circuit values, find suitable standard resistors, and organize your components and projects in one clean app. CALCULATORS • Decode 3, 4, 5, and 6-band resistor color codes • Convert resistance values into color bands • Decode and encode SMD resistor markings • Calculate series and parallel resistors • Find target resistance combinations using standard E-series values • Calculate voltage, current, resistance, and power with Ohm’s law • Design series and parallel LED circuits • Calculate voltage dividers • Calculate resistor power and recommended power ratings • Automatically convert engineering units PROJECT TOOLS • Save calculation history and favorites • Create reusable presets • Organize components into projects and bills of materials (BOM) • Export project data as PDF or CSV • Back up and restore supported local data • Copy and share calculation results • Access built-in electronics references DESIGNED FOR EVERYDAY USE • Clear circuit diagrams and standard electrical symbols • Light and dark themes • Adjustable calculator and display preferences • Interface available in 13 languages • Core calculations run locally on your device The free version contains ads. OhmKit Pro removes ads and unlocks additional workflow features. Purchases are securely processed through the App Store. Calculation results are provided as engineering aids. Always verify component ratings and manufacturer specifications before building or powering a circuit.

About

Altimeter + Barometermeter

Features
Read full description

This is not an altimeter that pretends to be exact. GPS, barometer, and your calibration anchor are shown separately. If the uncertainty is large, you will not get a fake integer. Altitude Calibrator fuses GPS orthometric height with a calibrated barometer and shows confidence plus an error range. Built for hiking, climbs, and checking a reading against a trail sign or pass marker. Free • Live altitude with GPS / pressure / anchor side by side • Trip high, low, and cumulative ascent • Altitude cards to save or share Membership unlocks tools (3-day free trial, then weekly auto-renewal) Compass, speed, pressure, sunrise/sunset, level, flashlight, and coordinates. Altitude, trips, and cards stay free. Manage or cancel in Settings › Apple ID › Subscriptions. Unless auto-renew is turned off at least 24 hours before the period ends, the weekly charge continues after the trial. Readings include uncertainty and are not a surveying product. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.qq.com/doc/DVXVhRHF5VXdBdmt5

Screenshots

OhmKit4 screens
Altimeter + Barometermeter4 screens

Verdict

The call

The clearest difference is ads: Altimeter + Barometermeter at none against OhmKit's shown. Altimeter + Barometermeter also leads on update cadence (every 2 days vs every 6 weeks). OhmKit's advantage is iOS requirement (15.0 vs 17.0). On price, 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. OhmKit sells 1 one-off in-app purchase and Altimeter + Barometermeter sells 1 in-app purchase, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

OhmKit ships an update every 6 weeks, Altimeter + Barometermeter every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 3 level
OhmKit versus Altimeter + Barometermeter: the parameters behind the verdict, then further details
ParameterOhmKitAltimeter + Barometermeter
PriceFreeFree
Update frequencyEvery 6 weeksEvery 2 days — better
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size30 MB4 MB
Age rating4+4+
DeveloperYAVUZHAN CANAKCI佳俊 高

In-app purchases

1 purchases

OhmKit

One-time1
  • Remove Ads$1.99
1 purchases

Altimeter + Barometermeter

Subscriptions1
  • Annual Membership3 Days trial$49.991 Year

Questions

Is OhmKit free?
OhmKit is free to download, with in-app purchases available.
Is Altimeter + Barometermeter free?
Altimeter + Barometermeter is free to download, with in-app purchases available.
Do OhmKit or Altimeter + Barometermeter have ads?
OhmKit shows ads; Altimeter + Barometermeter does not.
Which is updated more often, OhmKit or Altimeter + Barometermeter?
OhmKit ships an update every 6 weeks, and Altimeter + Barometermeter every 2 days. Most recently, OhmKit was updated on November 5, 2026 and Altimeter + Barometermeter on October 31, 2026.

Other comparisons