# heatapp_ vs Doc Black Ink

The clearest difference is review sentiment: Doc Black Ink at 100% against heatapp_'s 9%. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | heatapp_ | Doc Black Ink |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 43 MB | 240 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Think Renewables Ltd](https://appshunter.io/developer/1879786296) | [Doc Black Ink Ltd](https://appshunter.io/developer/1722403196) |

## What reviewers say

### heatapp_

[App page](https://appshunter.io/ios/app/heatapp/id736015783)

Gain complete control over your electric heating system to manage energy consumption and reduce bills. This app allows remote adjustments to temperature, scheduling, and room-specific settings from anywhere.

**Highlights:** Remote temperature adjustment, Set everyday heating preferences, Quick changes and updates, Turn heating on/off remotely, Set individual room programs, Monitor settings globally

**In-app purchases:** none


### Doc Black Ink

[App page](https://appshunter.io/ios/app/doc-black-ink/id6474721638)

Discover tattoo services, book appointments with artists, and explore customizable options. Purchase gift cards and merchandise, and securely submit payment details.

**Highlights:** Browse tattoo service menus, Book permanent makeup or tattoos, View business hours and contact info, Purchase packages and gift cards, Secure payment submission

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is heatapp_ free?

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

### Is Doc Black Ink free?

Doc Black Ink is free to download, with no in-app purchases.

### Do heatapp_ or Doc Black Ink have ads?

Neither heatapp_ nor Doc Black Ink shows ads.

### Which is updated more often, heatapp_ or Doc Black Ink?

heatapp_ ships an update every 2 months, and Doc Black Ink every 2 months. Most recently, heatapp_ was updated on October 16, 2026 and Doc Black Ink on October 11, 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.*