Comparison

COLT 4 vs Main

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

Head to head
About

COLT 4

Features
Read full description

COLT app is a free-to-download app for the COLT (clamp on line tension meter). The COLT app's simple and easy-to-use interface will enable the operator to use the app with the utmost efficiency.

About

Main

Features
Read full description

Main-Tain keeps everything you own running. Cars, homes, boats, motorcycles, RVs, tractors, equipment โ€” one app, one schedule, nothing forgotten. START FREE Track your first vehicle, home, or machine at no cost, with every feature included. Not a trial โ€” no countdown, no card required. Subscribe when you're ready to add more. EVERYTHING IN ONE PLACE Add what you own and Main-Tain keeps its full history: what was serviced, when, what it cost, and who did it. Stop digging through the glovebox. SCHEDULES THAT FIT Start from recommended intervals or set your own โ€” by mileage, by time, or by engine hours. A tractor and a sedan don't need the same plan, so they don't get the same one. REMINDERS THAT LAND Get notified when something is coming due, before it becomes a repair bill. RECEIPTS AND PHOTOS Attach receipts, invoices, and photos to any service record. Warranty claims and resale conversations get a lot easier when you can show the paperwork. BUILT FOR RESALE Complete, documented service history is what separates a fair price from a lowball offer. Main-Tain keeps yours ready. WORKS OFFLINE Log service in a garage, a barn, or a driveway with no signal. It syncs when you reconnect. SUBSCRIPTION Main-Tain is free for your first item. A subscription adds unlimited vehicles, homes, and equipment: โ€ข Monthly โ€” $0.99 โ€ข Yearly โ€” $9.99 Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use: https://main-tain.app/terms Privacy Policy: https://main-tain.app/privacy

Screenshots

COLT 44 screens
Main4 screens

Verdict

The call

The clearest difference is in-app purchases: COLT 4 at none against Main's 2. Main's advantage is update cadence (daily vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Main sells 2 in-app purchases, starting at $0.99 per month. COLT 4 asks for nothing beyond the download.

UpkeepUpdate frequency

COLT 4 ships an update monthly, Main daily. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

Scorecard2 real differences ยท 4 level
COLT 4 versus Main: the parameters behind the verdict, then further details
ParameterCOLT 4Main
PriceFreeFree
Update frequencyMonthlyDaily โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 โ€” better16
Further details โ€” not scored
Size155 MB19 MB
Age rating4+4+
DeveloperStraightpointHayden Patteson

In-app purchases

None

COLT 4

No in-app purchases

2 purchases

Main

Subscriptions2
  • Monthly Main-Tain Subscription$0.991 Month
  • Main-Tain Yearly Subscription$9.991 Year

Questions

Is COLT 4 free?
COLT 4 is free to download, with no in-app purchases.
Is Main free?
Main is free to download, with in-app purchases available.
Do COLT 4 or Main have ads?
Neither COLT 4 nor Main shows ads.
Which is updated more often, COLT 4 or Main?
COLT 4 ships an update monthly, and Main daily. Most recently, COLT 4 was updated on October 5, 2026 and Main on October 16, 2026.

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