# Mark Draft vs iFLOW HVAC

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.

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.

## The numbers

| Metric | Mark Draft | iFLOW HVAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (105 ratings)](https://appshunter.io/ios/app/mark-draft-screenshot-markup/id1127738687/reviews)** | — |
| Number of ratings | **105** | — |
| Positive reviews | **56.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 49 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [勇强 温](https://appshunter.io/developer/854472271) | [iFLOW HVAC INC.](https://appshunter.io/developer/1359269947) |

## What reviewers say

### Mark Draft

[App page](https://appshunter.io/ios/app/mark-draft-screenshot-markup/id1127738687)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### iFLOW HVAC

[App page](https://appshunter.io/ios/app/iflow-hvac/id1359269948)

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.

**Highlights:** Remote unit monitoring, Sensor and operational data display, Component testing mode, Configurable settings, Error code diagnostics, Troubleshooting assistance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mark Draft free?

Mark Draft is free to download, with in-app purchases available.

### Is iFLOW HVAC free?

iFLOW HVAC is free to download, with no in-app purchases.

### Do Mark Draft or iFLOW HVAC have ads?

Mark Draft shows ads; iFLOW HVAC does not.

### Which is updated more often, Mark Draft or iFLOW HVAC?

Mark Draft ships an update monthly, and iFLOW HVAC every 5 weeks. Most recently, Mark Draft was updated on October 24, 2026 and iFLOW HVAC on September 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*