Comparison

G vs Daymark

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

Head to head
About

G

Measure real-time G-forces on three axes with a precision crosshair display. Track peak G, acceleration history, and impact forces. Ideal for car performance, roller coasters, aviation, and physics experiments.

Highlights
  • 3-axis G-force tracking
  • Precision crosshair display
  • Peak G detection
  • Real-time chart recording
  • G-force level guide
  • Adjustable sensitivity
Features
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G-Force Meter+ Accelerometer shows the G-force your phone feels right now on every axis, then turns each drive, ride or run into a result you can read: press Start, press Stop, and a session card shows the peak G, the average G and how hard you cornered, accelerated and braked. ▶ Live G-force on every axis • Total G on a round gauge with a moving dot for the direction of the force • Lateral (X), longitudinal (Y) and vertical (Z) values side by side • Min, average, max and peak while you record, plus peak chips for lateral, accel and brake • A scrolling chart of X, Y, Z and total G, or a sentence that explains the current G level ▶ Stop and see the session Press Stop and a Session result card appears: • Duration, peak G and average G • Peak lateral, peak accel and peak brake • A second-by-second G trend line (the first 10 minutes of a session) • With the Car activity selected, a plain-language reading of the drive, from Gentle to Very hard, based on the peak horizontal G Every finished session is saved to History automatically (the last 20). A session shorter than 2 seconds is not saved. If you switch apps mid-session, recording pauses in the background and the same session resumes when you return, and a session cut off when the system closes the app is recovered into History on the next launch. Share a result as text in one tap. ▶ History and personal bests Open History from the top of the Meter screen: personal bests, every session with its G trend, your race runs and rolling runs. Export sessions, runs or rolling intervals as CSV. A statistics report CSV unlocks for 24 hours after a short ad. ▶ G-G friction circle A dedicated tab plots lateral against longitudinal G as a trail inside rings at 0.5, 1.0 and 1.5 G, with peak lateral, longitudinal and combined G, so you can see how much grip you used in corners and under braking. ▶ Race mode • 0-60 mph launch timing with raw and rollout times • 60-0 mph brake test with time, distance and speed shed, estimated from the motion sensors • Rolling intervals: 60-120 mph, 100-200 km/h, 30-50 mph or your own range • GPS cross-check with a GPS 0-60 time, a quarter mile time and trap speed. A good fix shows a GPS-verified badge, otherwise the result is labelled as a sensor estimate • Regen profile for electric cars: braking events sorted by their strength into likely regen (gentle) and likely friction (hard), with their maximum G ▶ Set up for your car • Dash or Holder mount, auto-level and Re-level now • Reference 1G (resting reads 1.00 G) or 0G (resting reads 0.00 G) • Display sensitivity from 0.5x to 2.0x for the live gauge; the result card always shows the true values • Activity presets for Car, Roller-coaster, Sport, Elevator and Aircraft explain what each G level means there • A Guide tab with 8 tips on mounting, reading each axis and typical G in daily life • The screen stays on while recording • Interface in 30 languages ▶ Good to know Readings come from the phone's motion sensor, so mount the phone firmly and level it before you record. Launch and braking times are estimates unless they carry the GPS-verified badge. Only drive-test where it is safe and legal. For drivers checking how smooth or hard they drive, track-day and drag-strip fans, roller-coaster riders, and students who want to see physics in numbers.

About

Daymark

Features
Read full description

Daymark turns the things you're looking forward to into beautiful countdowns you can see at a glance — on your Home Screen, Lock Screen, and in the app. Create a countdown for anything: a trip, a birthday, a launch, a wedding, a due date, or the last day of school. Pick a color theme and an emoji, choose how it counts, and Daymark keeps track for you. WIDGETS THAT ACTUALLY LIVE ON YOUR SCREEN • Home Screen and Lock Screen widgets in every size • Pin one countdown, or let a widget rotate through all of them • Detailed events show a live, ticking countdown right on the widget DAYS — OR DOWN TO THE SECOND • "Days" mode for a clean "12 days to go" • "Detailed" mode adds a time of day and a live days · hours · minutes · seconds countdown • Count UP mode too — track anniversaries, sobriety, or "days since" any date NEVER MISS THE MOMENT • Reminders before each event: 1 week, 1 day, 1 hour, and when it happens • A little celebration when a countdown hits zero MAKE IT YOURS (PRO) • 18 gorgeous color themes • Set a photo as the backdrop — on the card and the widget — and choose exactly what shows • Unlimited countdowns QUICK ADD • Add holidays in one tap • Pull birthdays straight from your Contacts SHARE THE COUNTDOWN • Send a countdown by text or email — friends can add it in a tap • Photo backdrops travel with the share • Export a gorgeous image for Stories SYNC & PRIVATE • iCloud sync keeps your countdowns on all your devices • No account, no ads, no tracking FREE & PRO Daymark is free with up to 3 countdowns and 2 themes. Daymark Pro is a one-time purchase — no subscription — that unlocks unlimited countdowns, all 18 themes, and photo backdrops. Start counting down to what matters.

Screenshots

G3 screens
Daymark3 screens

Verdict

The call

The clearest difference is in-app purchases: G at none against Daymark's 1. Daymark's advantage is ads (none vs shown) and update cadence (daily vs every 4 days). On price 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. Daymark sells 1 one-off in-app purchase. G asks for nothing beyond the download.

UpkeepUpdate frequency

G ships an update every 4 days, Daymark daily. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 5 level
G versus Daymark: the parameters behind the verdict, then further details
ParameterGDaymark
PriceFreeFree
Rating3.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 4 daysDaily — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS16.4 — better17.0
Further details — not scored
Size53 MB3 MB
Age rating17+4+
DeveloperKyu-Hee JangAdam hollett

In-app purchases

None

G

No in-app purchases

1 purchases

Daymark

One-time1
  • Daymark Pro$3.99

Questions

Is G free?
G is free to download, with no in-app purchases.
Is Daymark free?
Daymark is free to download, with in-app purchases available.
Do G or Daymark have ads?
G shows ads; Daymark does not.
Which is updated more often, G or Daymark?
G ships an update every 4 days, and Daymark daily. Most recently, G was updated on October 16, 2026 and Daymark on October 10, 2026.

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