# HF Smart Pro vs Instant Cal

The clearest difference is ads: HF Smart Pro at none against Instant Cal's shown. HF Smart Pro also leads on iOS requirement (12.0 vs 15.0). Instant Cal's advantage is update cadence (every 2 weeks vs every 6 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HF Smart Pro ships an update every 6 months, Instant Cal every 2 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HF Smart Pro | Instant Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.4 (20 ratings)](https://appshunter.io/ios/app/hf-smart-pro/id6473008782/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 18.9% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 24 MB | 31 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [鉴深 徐](https://appshunter.io/developer/1649273564) | [Taek Oh](https://appshunter.io/developer/1616205954) |

## What reviewers say

### HF Smart Pro

[App page](https://appshunter.io/ios/app/hf-smart-pro/id6473008782)

Control smart lights with customizable color changes and timing functions. Adjust light environments directly through mode control, altering color based on intensity, refraction, and opacity.

**Highlights:** Change light colors, Timing mode for smart lights, Timing switch for light control, Mode control for light environments, Adjust color by intensity, refraction, opacity

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Works with fan/light
- 👍 Helpful hints from reviewers
- 👍 Great product design

**What reviewers complain about**

- 🐛 Difficult pairing process
- 🐛 Poor/confusing instructions
- 🐛 ESL issues with wording
- 🐛 Integration issues with Google/Alexa
- 🐛 App doesn't control fan/light

**Reported bugs**

- Pairing fails
- App doesn't connect to Bluetooth
- App doesn't work
- Product is defective
- Fan only works, lights don't

**Requested features**

- Improve pairing directions
- Add Google/Alexa integration
- Improve app wording/translation
- Allow pairing anytime
- Make light dimmable


### Instant Cal

[App page](https://appshunter.io/ios/app/instant-cal/id6772655662)

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

**In-app purchases:** none


## Frequently asked questions

### Is HF Smart Pro free?

HF Smart Pro is free to download, with no in-app purchases.

### Is Instant Cal free?

Instant Cal is free to download, with no in-app purchases.

### Do HF Smart Pro or Instant Cal have ads?

Instant Cal shows ads; HF Smart Pro does not.

### Which is updated more often, HF Smart Pro or Instant Cal?

HF Smart Pro ships an update every 6 months, and Instant Cal every 2 weeks. Most recently, HF Smart Pro was updated on October 30, 2026 and Instant Cal on October 28, 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.*