Comparison

SMS ONE vs SAWIN

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

Head to head
About

SMS ONE

This app streamlines onsite validation and work order management for affiliates. It offers real-time communication, photo capture for service verification, and GPS-enabled check-in/out, reducing administrative costs and improving workflow efficiency.

Highlights
  • Work order management
  • Onsite validation
  • Real-time communication
  • Photo capture
  • GPS check-in/out
  • Map directions
Features
Read full description

The SMS ONE app (SMS ONE) is an application utilized by our network of affiliates to help manage work orders and streamline the onsite validation process into one simple system. It is fully integrated with the SMS One Affiliate Portal and creates real-time communication and work order visibility between the affiliates’ home office, crews and SMS Assist. The SMS ONE app improves the workflow process for both affiliate field technicians and administrators in the following ways: • Allows affiliate administrators to remotely monitor and manage the status of work order information in one place • Eliminates back-office costs and paperwork on every work order • The photo feature captures before and after pictures to ensure every service is completed to 100% satisfaction • The GPS-enabled functionality reduces technicians check in and out time to under one minute • The application has a simple messaging service that connects technicians with SMS Assist and reduces the need for time consuming follow-up calls • Provides easy map directions to each job site With the SMS ONE mobile app, managing your work orders and crews has never been easier. 【Note】 Route planning will continue to use location services and consumes more phone battery while active. Please note: the route planning and technician reporting continue using the GPS services while the app is running and will continue to consume battery power. Compliant with Apple policy, our app will only support iOS versions 7.X and higher. If you do not have a compliant iOS version, please update your system to meet these requirements.

About

SAWIN

This app streamlines service calls for HVAC technicians, plumbers, and electricians. It offers features for dispatching, invoicing, payment collection, and detailed service and equipment history tracking. Users can also create purchase orders, checklists, estimates, and authorize work.

Highlights
  • Service call dispatching
  • Invoicing with parts/items
  • Payment collection
  • Before/after work photos
  • Service and equipment history
  • Purchase order creation
  • Checklist completion
  • Estimate building
Features
Read full description

Sawin mobile app is an easy to use, productive, reliable, and result oriented app that helps everyday HVAC technicians, Plumbers, Electricians provide exceptional customer service day in day out. App is geared with useful features like Dispatching\Arriving\Completing the service calls, invoicing – add parts or other items to the invoice, payment collection, take pictures to show before\after work, show service history, equipment history, create purchase orders, compete check list, build estimates, authorise work, and much, much more.

Screenshots

SMS ONE4 screens
SAWIN4 screens

Verdict

The call

The clearest difference is rating: SMS ONE at 2.4 against SAWIN's 1.0. SMS ONE also leads on review sentiment (36% vs 0%) and ratings volume (122 vs 13). SAWIN's advantage is update cadence (fortnightly vs monthly). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SMS ONE holds the better App Store score, 2.4 against 1.0. That said, the two scores are not equally well evidenced: SMS ONE has 122 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 36% of SMS ONE's written reviews are positive against 0% of SAWIN's.

UpkeepUpdate frequency

SMS ONE ships an update monthly, SAWIN fortnightly. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
SMS ONE versus SAWIN: the parameters behind the verdict, then further details
ParameterSMS ONESAWIN
PriceFreeFree
Rating2.4 (122 ratings) — better1.0 (13 ratings)
Positive reviews36.0% of reviews — better0.0% of reviews
Number of ratings122 — better13
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better13.0
Further details — not scored
Size120 MB44 MB
Age rating4+4+
DeveloperSMS Assist, LLC.Service Automation, Inc

Customer experience

SMS ONE

All ratings122 ratings
Positive30.3%
Neutral4.1%
Negative65.6%
Written reviews25 reviews
Positive36.0%
Neutral4.0%
Negative60.0%

SAWIN

All ratings13 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

SMS ONE

No in-app purchases

None

SAWIN

No in-app purchases

Questions

Is SMS ONE free?
SMS ONE is free to download, with no in-app purchases.
Is SAWIN free?
SAWIN is free to download, with no in-app purchases.
Which has better reviews, SMS ONE or SAWIN?
SMS ONE is rated higher. SMS ONE averages 2.4 out of 5 from 122 ratings, while SAWIN averages 1.0 from 13 ratings.
Do SMS ONE or SAWIN have ads?
Neither SMS ONE nor SAWIN shows ads.
Which is updated more often, SMS ONE or SAWIN?
SMS ONE ships an update monthly, and SAWIN fortnightly. Most recently, SMS ONE was updated on October 14, 2026 and SAWIN on October 9, 2026.

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