Heat Engineer vs onfish angler
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Heat Engineer
This app assists heating engineers and surveyors in collecting property data for heating system installations. It supports heat loss reports for various technologies and includes tools for sound assessments and quick estimations. Data is automatically saved for later review and amendment.
- Heat loss survey for BS EN 12831, CIBSE, and MCS standards
- MCS 020 sound assessment for Air Source Heat Pumps
- Quick heat loss estimator tool
- Automatic data saving and history for amendments
- Room-by-room heat loss calculation
- Photo capture for rooms and installation locations
- Fuel comparisons and running cost calculations
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Heat Engineer Software helps heating engineers and surveyors capture property information on site, carry out heat loss surveys and assess air source heat pump sound levels. From a quick estimate to a detailed room-by-room survey (3D LiDAR scanning), gather the information you need for heat pump and conventional heating system design. Work from your iPhone or iPad, then continue with your project in the Heat Engineer desktop platform. ROOM-BY-ROOM HEAT LOSS SURVEYS Capture the property details needed for heat loss calculations designed to follow BS EN 12831-1:2017, the CIBSE Domestic Heating Design Guide and relevant MCS requirements. β’ Create rooms using preset or custom names. β’ Record room dimensions, building materials and construction details. β’ Select materials from the built-in library or enter custom descriptions and U-values. β’ Record walls, floors, windows, doors, ceilings and roofs. β’ Capture complex room shapes and vaulted ceilings using illustrated profiles. β’ Record existing radiator types and dimensions to support emitter assessment. β’ Add photographs of rooms and proposed installation locations. β’ Continue your survey in the desktop platform to review calculations and produce detailed reports. CHOOSE HOW YOU MEASURE Use a tape measure or laser measure and enter your measurements, or use built-in LiDAR scanning on a compatible iPhone or iPad to capture room dimensions and layouts. Choose the survey method that suits the property and the equipment you have available. LiDAR scanning requires a compatible device with a LiDAR sensor. FLOOR PLANS AND LIDAR SCANNING Bring your survey to life with a visual layout of the property. β’ Scan rooms using supported LiDAR devices. β’ View captured rooms and layouts. β’ See room dimensions and radiator locations within your floor plans. β’ Export 2D floor plans to PDF for use alongside your project documentation. WHOLE-HOUSE HEAT LOSS AND QUICK ESTIMATES Assess a property before progressing to a detailed room-by-room survey. Use whole-house heat loss and quick estimation tools to support early discussions, initial project assessments and quotation preparation. Preliminary estimates help you get started. Complete a detailed room-by-room calculation to support final heating system and emitter design. AIR SOURCE HEAT PUMP SOUND ASSESSMENTS Carry out sound assessments to support assessment of the noise requirements associated with permitted development. β’ Record the proposed heat pump manufacturer and model. β’ Enter the manufacturerβs A-weighted sound power level. β’ Record the assessment position and add supporting photographs. β’ Review the assessment result. β’ Return to an assessment to update equipment details or site information. β’ Produce a PDF assessment report for your project records. A sound assessment addresses noise criteria; other planning requirements may also apply. CONNECTED FROM SITE TO DESKTOP Keep your mobile survey and desktop project connected with the updated Heat Engineer platform. Save your work, revisit surveys and assessments, and continue adding information as the project develops. Capture details on site, then use the desktop platform for further design work and reporting. GET STARTED A Heat Engineer account is required. Visit our website to create an account, explore the platform and watch our training videos
onfish angler
This app helps anglers log observations, save fishing spots, and track patterns to understand the lakes they fish. It organizes data on weather, moon phase, and catches to reveal insights for better fishing.
- Save fishing spots with details
- Log observations and catches
- Track weather and moon phase
- Analyze fish movement patterns
- Securely store your data
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Built for carp anglers who understand that watercraft is the real edge. Log your observations, save your spots, track the patterns, and build a picture of the lakes you fish. β SAVE YOUR SPOTS You spent hours finding that gravel bar. The silt gully off the point. The clear patch between the weed beds. Save the wraps, the horizon marker, the substrate β and get the rods out quietly and with precision next time. LOG WHAT MATTERS Fish shows at dawn. A capture on the new moon. The swim that produces on a wind change. onfish captures the details that add up β so you can see the patterns others miss. SEE THE BIGGER PICTURE Every session teaches you something. onfish organises your observations so the next move becomes clear. Weather, moon phase, conditions β all connected to your catches, sessions and observation logs. TRACK OTHER CAPTURES Know what's being caught and where. Log captures from around the lake to build a fuller picture of fish movement and feeding patterns. YOUR DATA, YOUR EDGE onfish is secure by design. Your spots, your notes, your hard-earned knowledge stays private. Built for secret squirrels, by secret squirrels. β FREE TO START Log sessions and catches, save spots, record fish shows and lake notes. Everything you need to build the picture and unlock the code. PREMIUM Unlimited spots, shows, captures, and session notes. Weather and moon phase intelligence. The full picture, no limits. β SUBSCRIPTION INFORMATION onfish Premium is available as a monthly (Β£3.99) or annual (Β£34.99) subscription. Annual includes 3 months free β 12 months for the price of 9. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel subscriptions in your Account Settings on the App Store after purchase. Terms of Use: https://www.termsfeed.com/live/fdd84a8b-c3dc-4cf3-a2e7-5fe5a16ea956 Privacy Policy: https://www.termsfeed.com/live/57a676fa-a527-4427-ac7c-aaed0eaa7257 β onfish is built by anglers, for anglers. No hype, no gimmicks β just a focused tool for the ones who put the work in and want to make every session count. Questions or feedback? info@onfish.co.uk
Screenshots
Verdict
The clearest difference is review sentiment: Heat Engineer at 79% against onfish angler's 50%. Heat Engineer also leads on monetization model (free vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Heat Engineer sells 1 one-off in-app purchase and onfish angler sells 3 in-app purchases, starting at $3.49 per month. Whichever you choose, the download price is not the number that matters.
Heat Engineer ships an update every 2 months, onfish angler every 5 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.
| Parameter | Heat Engineer | onfish angler |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 78.9% of reviews β better | 50.0% of reviews |
| Update frequency | Every 2 months | Every 5 weeks β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free β better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.6 β better |
| Further details β not scored | ||
| Size | 306 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Heat Engineer Software Ltd | Stephen Windsor |
Customer experience
Heat Engineer
onfish angler
In-app purchases
Heat Engineer
- MCS 020 PDF Report Token$2.99
onfish angler
- OnFish Monthly Subscription$3.491 Month
- Premium Monthly$3.991 Month
- Premium Annual$34.991 Year
Questions
Is Heat Engineer free?
Is onfish angler free?
Do Heat Engineer or onfish angler have ads?
Which is updated more often, Heat Engineer or onfish angler?
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