Comparison

HelioPeak vs Accel Timer

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

Head to head
About

HelioPeak

Monitor your solar panel production and consumption with detailed charts and reports. Analyze year-over-year comparisons, system health, and estimated revenue. Annotate daily data and export reports in various formats.

Highlights
  • Live power readings and daily production overview
  • Production, Consumption, and Combined views
  • Year-over-year comparisons and annual reports
  • System health indicators
  • Annotate daily data with notes
  • CSV and JSON data export
  • Home screen widgets
Features
Read full description

HelioPeak gives you a clean, modern way to follow your solar production and consumption with your PVOutput.org data, on iPhone, iPad and Mac. DASHBOARD & CHARTS • Dashboard with live power, today's production and peak, self-use, grid export and import, and estimated revenue • Production, Consumption and Combined views in the charts • Interactive charts for Day, Week, Month, Year and Total, with arrows to step through each period and a date picker to jump anywhere • Your own target line, from the monthly estimates you entered on PVOutput, in the Week, Month and Year charts COMPARE • Lay yesterday, the same day last year, your record day or any date behind the day you are looking at • Show the same period of another year behind your Week, Month and Year bars, with the difference in percent • Put up to four of your systems side by side, per kWp so different sizes compare fairly, also their day curves • Year-over-Year Comparison of today, this month and the year to date, with percentage changes and a shareable one-page PDF SIRI & SHORTCUTS • Ask how much your system produced today, yesterday or this month, without opening the app • The same questions in the Shortcuts app, for any of your systems SOLAR MOMENTS • Shareable cards for records, milestones, quarter and year recaps, installation anniversaries and sunny streaks, with a notification • Statistics: all your moments at a glance, the records to beat and the next milestone INSIGHTS & REPORTING • Annual Report PDF: a multi-page A4 report with totals, monthly breakdown, peak days and yield, in all six app languages • Monthly Report: after each month, a one-page PDF per system, the month against last year and your estimate • Export for AI: one file with your history for the AI assistant of your choice • CSV and JSON export of your daily production and consumption • System health dots: see at a glance whether each system reports normally • Specific Yield (kWh/kWp per year) and Yearly Average, the solar industry's benchmarks • Estimated revenue from your electricity price, CO₂ savings and a tree equivalent iPAD & MAC • Native iPad layout with sidebar, Inspector panel, year heatmap and keyboard shortcuts • Also runs on Macs with Apple silicon (the iPad version) NOTES & TIMELINE • Add notes to any day: cleaning, weather, panel issues • Browse them in the Timeline; they sync across your Apple devices through iCloud WIDGETS • Home Screen widgets in three sizes, the large one with today's curve; each widget can show a different system • Lock Screen widgets with today's production UNDER THE HOOD • Smart caching: works offline, with up to 80% fewer API calls • Built-in demo system: try the app before connecting your own PRIVACY FIRST HelioPeak talks directly to the PVOutput API with your own read-only API key. Your key is stored on your device and goes only to PVOutput. No ads, no tracking. Anonymous usage statistics and crash reports help improve the app; you can switch them off in Settings. HOW IT WORKS 1. Create a read-only API key on pvoutput.org (Settings, API Access) 2. Enter your System ID and API key in HelioPeak 3. Explore your solar production and consumption HelioPeak never sees your PVOutput password. MULTIPLE SYSTEMS The free version supports one PVOutput system. Unlock unlimited systems with a single in-app purchase. HelioPeak is not affiliated with PVOutput.org. Revenue estimates are for information only.

About

Accel Timer

Read full description

Accel Timer is a GPS performance timing app built for drivers, riders and anyone who wants clear, repeatable run data. Measure acceleration and distance runs with live speed, G-force telemetry, countdown starts and GPS-based timing. Choose between automatic movement detection, custom speed ranges or countdown starts, then review your best results in a clean history view. Use the live map to follow your route, switch between map styles, and record your runs with the optional camera mode. Share polished summary cards showing your time, distance, speed and altitude difference. Perfect for 0–100 km/h, 0–60 mph, 400 m, 1/4 mile, custom speed ranges, cycling sprints and running distance tests. Key features: • GPS speedometer with analog gauge styles • Real-time G-force telemetry • 0–100 km/h, 0–60 mph and custom speed timing • Distance runs from 100 m to 5 km • Countdown, movement or speed-threshold start methods • Live Mapbox route view with map, satellite and hybrid styles • Optional camera preview and run recording mode • Local run history with best results • Clean share cards for posting your runs • Flexible settings for units, timing, sounds, layout and video behavior Accel Timer helps you test, compare and share performance runs without clutter.

Screenshots

HelioPeak4 screens
Accel Timer4 screens

Verdict

The call

The clearest difference is update cadence: HelioPeak at every 3 days against Accel Timer's every 4 weeks. Accel Timer's advantage is iOS requirement (14.0 vs 18.6). 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. HelioPeak sells 1 one-off in-app purchase and Accel Timer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HelioPeak ships an update every 3 days, Accel Timer every 4 weeks. Both last shipped on October 31, 2026.

Scorecard2 real differences · 7 level
HelioPeak versus Accel Timer: the parameters behind the verdict, then further details
ParameterHelioPeakAccel Timer
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.614.0 — better
Further details — not scored
Size14 MB80 MB
Age rating4+4+
DeveloperSven De TrochFlorent Pottevin

In-app purchases

1 purchases

HelioPeak

One-time1
  • Unlock Multiple Systems$5.99
3 purchases

Accel Timer

One-time3
  • Unlock full app$0.99
  • Unlock full app + Support developer$1.99
  • Legend Tip$400.00

Questions

Is HelioPeak free?
HelioPeak is free to download, with in-app purchases available.
Is Accel Timer free?
Accel Timer is free to download, with in-app purchases available.
Do HelioPeak or Accel Timer have ads?
Neither HelioPeak nor Accel Timer shows ads.
Which is updated more often, HelioPeak or Accel Timer?
HelioPeak ships an update every 3 days, and Accel Timer every 4 weeks. Most recently, HelioPeak was updated on October 31, 2026 and Accel Timer on October 31, 2026.

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