# THEOREM CONCEPTS vs Hitemp

The clearest difference is review sentiment: THEOREM CONCEPTS at 50% against Hitemp's 6%. Hitemp's advantage is update cadence (every 2 months vs every 9 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

THEOREM CONCEPTS ships an update every 9 months, Hitemp every 2 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | THEOREM CONCEPTS | Hitemp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **50.0% of reviews** | 6.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 43 MB | 34 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [THEOREM Pty Ltd](https://appshunter.io/developer/1280266469) | [展悦 梁](https://appshunter.io/developer/982085158) |

## What reviewers say

### THEOREM CONCEPTS

[App page](https://appshunter.io/ios/app/theorem-concepts/id1280266470)

This application functions as a remote control specifically for recliners. It allows users to operate their compatible recliner chairs directly from their iPhone or iPod.

**Highlights:** Recliner remote control, iPhone and iPod compatible, Dedicated recliner operation

**Features:** macOS Compatibility

**In-app purchases:** none


### Hitemp

[App page](https://appshunter.io/ios/app/hitemp/id1512533849)

Remotely manage your heat pump water heater with this app. Control startup, shutdown, temperature, and modes. It also monitors unit status and alerts you to faults.

**Highlights:** Remote startup & shutdown, Temperature setting, Mode switching, Operation status recording, Fault alarms

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

**In-app purchases:** none


## Frequently asked questions

### Is THEOREM CONCEPTS free?

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

### Is Hitemp free?

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

### Do THEOREM CONCEPTS or Hitemp have ads?

Neither THEOREM CONCEPTS nor Hitemp shows ads.

### Which is updated more often, THEOREM CONCEPTS or Hitemp?

THEOREM CONCEPTS ships an update every 9 months, and Hitemp every 2 months. Most recently, THEOREM CONCEPTS was updated on October 14, 2026 and Hitemp on October 7, 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.*