Comparison

GPS Race Timer vs LumoHomeSync

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

Head to head
About

GPS Race Timer

Accurately measure vehicle acceleration times like 0-60 mph and 1/4 mile using your iPhone's GPS. Set up timers beforehand and let the app automatically start measurements when speed targets are met or motion is detected. Save, export, and transfer your performance data easily.

Highlights
  • Measure 0-60 mph, 60-120 mph, 1/4 mile
  • Automatic start detection
  • Save and export results
  • Preset and adjustable timers
  • No extra hardware required
  • Optional PRO version features
Read full description

Measure acceleration times such as 0–60 mph, 60–120 mph and 1/4 mile directly with your iPhone — accurately and without extra hardware. The app is designed so it doesn’t need to be operated while driving; you just set everything up beforehand while stationary. Measurements then start automatically — when the target speed is reached or when a start is detected. You can save results locally on your iPhone and, if needed, export them or transfer them to other devices. Preset timers: 60 ft, 1/8 mile, 1/4 mile, 1/2 mile, 1 mile, 0 – 60 mph, 0 – 120 mph, 50 – 75 mph, 60 – 120 mph, 0 – 100 km/h, 0 – 200 km/h, 80 – 120 km/h, 100 – 200 km/h. All timers are, of course, fully adjustable. The free version measures up to two times per run. How to use the app: Check the timer settings on the start screen. If everything looks good, place your iPhone in the car where it has good GPS reception and is held securely, then start the acceleration test. You can adjust the timer configuration in the Settings screen (just tap the relevant timer). Then return to the race screen and follow the previous instruction. Optional PRO version (in-app purchase): 1. Up to four timers in parallel (instead of two) 2. Precise determination of elevation differences 3. Simulation of a Sportsman start and reaction-time measurement 4. No ad banners

About

LumoHomeSync

Features
Read full description

LumoHomeSync gives you clear, real-time insight into how your home uses and stores energy. Designed for homes with battery storage, solar generation, and smart tariffs, LumoHomeSync brings all your energy data into one clean, easy-to-understand interface. Key Features • Real-time battery, solar, grid, and home load monitoring • Clear energy flow visualisation and historical charts • Weather-aware insights to help you plan energy usage • Smart tariff and off-peak awareness • Secure cloud-backed syncing across devices • Manual scheduling of charging and energy actions • Autonomous background automations based on tariffs, conditions, and availability Built for Clarity LumoHomeSync focuses on presenting accurate energy data without clutter. Dashboards are designed to help you understand what’s happening right now and how your energy usage changes over time. Privacy & Security Your data is handled securely and used only to provide app functionality. LumoHomeSync does not sell personal data or energy usage information. Whether you’re optimising solar usage, managing battery reserves, or simply want better visibility into your home’s energy, LumoHomeSync helps you make informed decisions with confidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

GPS Race Timer4 screens
LumoHomeSync4 screens

Verdict

The call

The clearest difference is ads: LumoHomeSync at none against GPS Race Timer's shown. LumoHomeSync also leads on update cadence (every 11 days vs every 7 months). GPS Race Timer's advantage is device support (3 vs 1) and iOS requirement (12.2 vs 18.5). On price and in-app purchases 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. GPS Race Timer sells 1 one-off in-app purchase and LumoHomeSync sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GPS Race Timer ships an update every 7 months, LumoHomeSync every 11 days. The most recent releases landed on October 20, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 6 level
GPS Race Timer versus LumoHomeSync: the parameters behind the verdict, then further details
ParameterGPS Race TimerLumoHomeSync
PriceFreeFree
Rating4.5 (2.8K ratings) — better—
Positive reviews34.4% of reviews—
Number of ratings2.8K — better—
Update frequencyEvery 7 monthsEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.2 — better18.5
Further details — not scored
Size50 MB93 MB
Age rating4+4+
DeveloperThomas HagenauJames Jowett

Bugs and requests

GPS Race Timer

Reported bugs

4 issues
  • Timer doesn't reset properly
  • App crashes on startup
  • Significant GPS/speed detection delays
  • Recorded times do not match actual performance

Requested features

4 requests
  • Add 60ft and 1/8 mile times
  • Automatic start/stop of timer
  • Manual start option for timer
  • Improved accuracy and consistency

LumoHomeSync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

GPS Race Timer

One-time1
  • PRO$4.99
3 purchases

LumoHomeSync

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Yearly$34.991 Year
One-time1
  • Lifetime Core$9.99

Questions

Is GPS Race Timer free?
GPS Race Timer is free to download, with in-app purchases available.
Is LumoHomeSync free?
LumoHomeSync is free to download, with in-app purchases available.
Do GPS Race Timer or LumoHomeSync have ads?
GPS Race Timer shows ads; LumoHomeSync does not.
Which is updated more often, GPS Race Timer or LumoHomeSync?
GPS Race Timer ships an update every 7 months, and LumoHomeSync every 11 days. Most recently, GPS Race Timer was updated on October 20, 2026 and LumoHomeSync on September 21, 2026.

Other comparisons