Sentinel InstaCheck + vs OtisIO
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Sentinel InstaCheck +
Read full descriptionHide full description
Used in conjunction with the InstaCheck water test kit - sold separately - the app guides users through best practice guidelines based on BS7593 standard; It generates a water quality report with tailored recommendations for ongoing system care, according to water test results. InstaCheck allows users to follow UK best practice at install and service visits, ensuring boiler and heat pump installations are protected against corrosion and scaling. Poor water quality and inadequate treatment can result in breakdowns, loss of heating efficiency and excessive fuel consumption; The tests and recommendations in InstaCheck reports are designed to help protect installations from these common problems.
OtisIO
Read full descriptionHide full description
OtisIO is the all-in-one platform for running a UK workforce. It brings scheduling, time and attendance, timesheets, payroll, HR, tasks and more into one app, so managers stop juggling spreadsheets, group chats and half a dozen separate tools. SCHEDULING - Build and publish rotas in minutes, with templates and repeating shifts - Fill open shifts, manage swaps and let staff set their availability - See who is working, and where, at a glance TIME AND ATTENDANCE - Staff clock in and out from their phone, with the location recorded on every punch - Or clock in on a shared tablet with face recognition, or by tapping an NFC point on site - Breaks, overtime and rounding are applied automatically to your rules TIMESHEETS AND PAYROLL - Approve hours in a couple of taps, with a full audit trail - Export straight to payroll and to Xero, with overtime priced correctly - No re-keying hours between systems TASKS AND OPERATIONS - Assign tasks and checklists with photo proof and due dates - Build forms, SOPs and documents, and collect sign-off - Job and ticket workflows for work that needs tracking PEOPLE AND HR - Onboarding that assigns people to sites and collects their details - Right-to-work and document checks, certifications and expiry reminders - Time off, holiday allowances and UK bank holidays AND MORE - Expenses with receipt capture and approvals - Equipment and asset sign-out, with digital hand-over agreements - Project time tracking and client billing - Reports on hours, attendance and cost Whether you run one site or many, OtisIO gives everyone, from the office to the front line, one app they actually open.
Screenshots
Verdict
The clearest difference is update cadence: OtisIO at every 10 days against Sentinel InstaCheck +'s every 4 months. Sentinel InstaCheck +'s advantage is device support (3 vs 1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sentinel InstaCheck + ships an update every 4 months, OtisIO every 10 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | Sentinel InstaCheck + | OtisIO |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 10 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod โ better | iPhone |
| Requires iOS | 15.0 โ better | 16.4 |
| Further details โ not scored | ||
| Size | 3 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Energy & Compliance Technology Ltd | SiegeOne Limited |
In-app purchases
Sentinel InstaCheck +
No in-app purchases
OtisIO
No in-app purchases
Questions
Is Sentinel InstaCheck + free?
Is OtisIO free?
Do Sentinel InstaCheck + or OtisIO have ads?
Which is updated more often, Sentinel InstaCheck + or OtisIO?
Other comparisons















