Comparison

TrueOffset vs HomeMonitor

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

Head to head
About

TrueOffset

This app precisely measures your device's clock accuracy against global time servers. It offers multiple clock faces, time scales, and audible time signals, including radio time codes. Analyze time source quality with detailed charts and compare IPv4/IPv6 responses.

Highlights
  • NTP server comparison
  • Multiple clock faces (analog, digital, NTP offset)
  • UTC & TAI time scales
  • Audible time signals and radio time codes
  • Dual-stack IPv4/IPv6 comparison
  • Flexible time source selection
  • Quality analytics charts
Features
Read full description

TrueOffset measures how far your iPhone or iPad's clock is from the world's time servers, and which way. Compare Network Time Protocol (NTP) servers with one another, see how far apart they are, and set any of them as your reference. FIVE CLOCK FACES - 12-Hour Classic — Traditional analog display - 24-Hour Scientific — Full day on one dial - NTP Offset — Dual second hands show device vs. true time - Digital — Large display with millisecond precision - Time Code — A radio time code spelled out second by second UTC & TAI TIME SCALES Show Coordinated Universal Time (UTC) and International Atomic Time (TAI), 37 seconds ahead of it, beside your local time, with deadbeat second hands that step on each second. TIME SIGNALS Hear the true second. Optional pips are timed against your NTP reference, so the start of each one marks the real second, not your device's idea of it. Choose from the classic broadcast signals, synthesized to their published pitch and timing: Six Pips (Greenwich Time Signal), WWV, WWVH, CHU, Jihō, Moscow Six Pips, and Australia's VNG. Sound them on the hour, every 15 minutes, or every minute. Bluetooth or AirPlay speaker running late? Measure its delay with the microphone and TrueOffset compensates. RADIO TIME CODES A clock sold as "atomic" is a radio listening to a distant station that spells out the time one second at a time. TrueOffset plays the codes of WWVB, DCF77, MSF, JJY (40 and 60 kHz), and BPC and shows each second being decoded as it is sent. Try setting a radio-controlled watch with it (beta), or switch on the DCF77 weather seconds to hear how Germany's station once sent a forecast. TRUEOFFSET MASTER CLOCK Our tribute to the U.S. Naval Observatory's telephone time service. A tick sounds every second while a voice announces your local time and then Universal Time, each ahead of a beep that lands on the true second. Prefer it quiet? Switch the voice off and keep the ticks. TrueOffset is not affiliated with the U.S. Naval Observatory. DUAL-STACK COMPARISON Ask one server over IPv4 and IPv6 side by side, to catch two different machines behind one name or a network that answers for both. FLEXIBLE TIME SOURCES Compare against Apple, Google, Cloudflare, NIST, US Naval Observatory, global NTP pools, or add your own servers. The default reference, ntp.trueoffset.app, is a Safran SecureSync 1200 with its own rubidium atomic clock. Set any source as your reference. QUALITY ANALYTICS Eight chart pages show the character of your time sources: - Overview — Every server at a glance - Offset History — Track drift over time - Offset Histogram — How the offsets are spread - Offset Range — Compare consistency across servers - Round Trip and Offset — See whether network delay moves the offset - Clock Sources — Decode reference clocks (GPS, PPS, Rubidium, Cesium) - IPv4 and IPv6 — Compare one server's two addresses - Rankings — Servers scored by jitter and round-trip time, with the steadiest named HELP IN THE APP What an offset is, why your clock drifts, what UTC and atomic time are, and what each screen shows, explained in the app. For anyone who cares how accurate their time really is, and wants to see the difference, not just trust it. Also on Apple TV. FOR TIMEKEEPERS: TRUEOFFSET FOR MAC Run your own time servers? The Mac app, free in this same listing, reads what they record about themselves and charts it, from six hours to a year: - NTPsec, ntpd, chrony, linuxptp, gpsd, Safran SecureSync, and Timebeat - Logs from a folder, or collected over SSH every hour, read-only - Offset, frequency, Allan deviation, temperature, peers, PTP, GNSS sky plots, and each machine's real-time clocks - Restarts, steps, and holdover found and marked, not averaged in - Your servers compared side by side as a fleet More at trueoffset.app/timekeepers --- In appreciation of Emerald Sequoia's Emerald Time.

About

HomeMonitor

Features
Read full description

HomeMonitor puts every accessory in your HomeKit home on a single screen. When your home mixes hardware from several manufacturers, keeping track means opening one vendor app after another. HomeMonitor groups everything by room and zone and shows the values that matter right now — brightness, temperature, humidity, lock state — all at once. DENSITY FIRST - Supports 27 accessory types - Grouped by room and zone - Reorder rooms, and the devices inside them - Values flash briefly when they change, so you notice - Offline status is decided by whether the accessory actually answers CONTROL, ONE DEVICE AT A TIME - Sliders for brightness, color temperature, hue, target temperature, fan speed and more - Every characteristic an accessory exposes, with its current value, valid range and read/write access SEE HOW THINGS CONNECT - Matter or bridged, and which bridge it sits behind - Home hub status - For Matter accessories: network type, IP addresses, Thread role and neighboring nodes PRIVATE BY DEFAULT - No account, no sign-in - No data collection of any kind. Everything stays on your device —————— PLANS The free tier shows every accessory and switches them on and off. Pro (one-time purchase) Faster updates, slider controls, reordering inside a room, and multiple homes Pro Max (auto-renewable subscription) Everything in Pro, plus a selectable refresh interval, a high-density display mode, advanced data with connection details, and a Settings screen About the Pro Max subscription - Available monthly or yearly - Payment is charged to your Apple Account at confirmation of purchase - Renews automatically unless canceled at least 24 hours before the end of the current period - Manage your subscription and turn off auto-renew in your account settings after purchase - Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://www.gyuniku.jp/legal.php

Screenshots

TrueOffset4 screens
HomeMonitor4 screens

Verdict

The call

The clearest difference is in-app purchases: TrueOffset at none against HomeMonitor's 3. TrueOffset also leads on device support (3 vs 1) and iOS requirement (17.6 vs 26.0). On price, 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. HomeMonitor sells 3 in-app purchases, starting at $1.99 per month. TrueOffset asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
TrueOffset versus HomeMonitor: the parameters behind the verdict, then further details
ParameterTrueOffsetHomeMonitor
PriceFreeFree
Rating5.0 (9 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings9 — better—
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple TV — betteriPhone
Requires iOS17.6 — better26.0
Further details — not scored
Size4 MB9 MB
Age rating4+4+
DeveloperRichard BollarKentaro Saito

In-app purchases

None

TrueOffset

No in-app purchases

3 purchases

HomeMonitor

Subscriptions2
  • HomeMonitor Pro Max (Monthly)$1.991 Month
  • HomeMonitor Pro Max (Yearly)$14.991 Year
One-time1
  • HomeMonitor Pro$4.99

Questions

Is TrueOffset free?
TrueOffset is free to download, with no in-app purchases.
Is HomeMonitor free?
HomeMonitor is free to download, with in-app purchases available.
Do TrueOffset or HomeMonitor have ads?
Neither TrueOffset nor HomeMonitor shows ads.
Which is updated more often, TrueOffset or HomeMonitor?
TrueOffset ships an update fortnightly, and HomeMonitor fortnightly. Most recently, TrueOffset was updated on November 5, 2026 and HomeMonitor on October 31, 2026.

Other comparisons