Mark Draft vs iFLOW HVAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mark Draft
Easily add numbered callouts, drawings, and text labels to screenshots and photos. Save your work as a draft to continue later, then share or copy the final image. Ideal for quick visual feedback and bug reporting.
- Numbered callouts with editable labels
- Drawing tools (pen, arrow, shapes)
- Adjustable stroke size and color
- On-device drafts for continuity
- Share Extension integration
- Undo/redo functionality
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Mark Draft helps you leave clear, numbered notes on screenshots and photos — then save a draft, pick up later, and share, copy, or save to Photos when you are ready. Open a photo from your library (or hand off from the Share Extension). Place numbered callouts, draw with pen or highlighter, add arrows and shapes, type text boxes, and edit short labels. Hold to peek the original under your markup. Everything stays on your device until you export it. FEATURES • Numbered callouts with editable labels • Pen, highlighter, arrow, rectangle, ellipse, text box, and eraser • Adjustable stroke size and color palette • Hold to peek the original photo under markup • On-device drafts — continue where you left off • Share Extension — send a screenshot into Mark Draft • Share, copy, or save the finished image to Photos • Undo / redo and clear markup (keeps your photo) • English, Simplified Chinese, Traditional Chinese, and Japanese • Optional one-time purchase to remove ads (not a subscription) Core markup, drafts, and sharing stay available without buying anything. Ads help keep Mark Draft free; remove them anytime with a single purchase tied to your Apple ID. Built for quick visual feedback — UI review, bugs, design notes — without a heavy editor.
iFLOW HVAC
This app provides remote monitoring and troubleshooting for HVAC units. It displays sensor data, allows component testing, and helps diagnose issues through error codes. Users can also configure various operational parameters for heating, cooling, and zoning.
- Remote unit monitoring
- Sensor and operational data display
- Component testing mode
- Configurable settings
- Error code diagnostics
- Troubleshooting assistance
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In addition, the iFLOW server can monitor these units from a distance for troubleshooting purposes. Information The information mode will display all the sensor and operational values : Water Temperature, Air temperature, GPM, CFM Ratio, Humidity, Zoning Status, Unit Operation Status Test Mode The test mode will allow testing of the unit’s components for troubleshooting : Blow Motor, Circulator, Relay, Zone Dampers Setting In the settings mode, the parameters can be set according to the specific installation conditions. General: Configure the overall function of the air handler Cooling: Set functions related to air conditioning Heating: Set functions related to heating Zone: Set functions related to zoning Error The error codes are displayed when the unit does not operate properly due to changes in the operating environment, improper installation, or when a problem such as a defective part occurs. These codes help to identify the problem and the manual will provide the most common solutions. more Information: www.iflowhvac.com
Screenshots
Verdict
The clearest difference is review sentiment: Mark Draft at 56% against iFLOW HVAC's 0%. iFLOW HVAC's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence, device support and iOS requirement 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
Both are free to download. Mark Draft sells 1 one-off in-app purchase. iFLOW HVAC asks for nothing beyond the download.
Mark Draft ships an update monthly, iFLOW HVAC every 5 weeks. The most recent releases landed on October 24, 2026 and September 26, 2026 respectively.
| Parameter | Mark Draft | iFLOW HVAC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (105 ratings) — better | — |
| Positive reviews | 56.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 105 — better | — |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 8 MB | 49 MB |
| Age rating | 4+ | 17+ |
| Developer | 勇强 温 | iFLOW HVAC INC. |
Customer experience
Mark Draft
iFLOW HVAC
In-app purchases
Mark Draft
- Remove Ads$1.99
iFLOW HVAC
No in-app purchases
Questions
Is Mark Draft free?
Is iFLOW HVAC free?
Do Mark Draft or iFLOW HVAC have ads?
Which is updated more often, Mark Draft or iFLOW HVAC?
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