# HVAC Decoder vs Date Stamp Photos

The clearest difference is rating: HVAC Decoder at 4.0 against Date Stamp Photos's 3.0. HVAC Decoder also leads on ratings volume (28 vs 1) and device support (3 vs 1). Date Stamp Photos's advantage is price ($1.99 vs $9.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

HVAC Decoder costs $9.99 and Date Stamp Photos $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HVAC Decoder holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: HVAC Decoder has 28 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | HVAC Decoder | Date Stamp Photos |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | **[4.0 (28 ratings)](https://appshunter.io/ios/app/hvac-decoder/id1355543096/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/date-stamp-photos/id6758065631/reviews) |
| Number of ratings | **28** | 1 |
| Positive reviews | 68.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | Paid |
| Size | 6 MB | 2 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Charles Cope](https://appshunter.io/developer/1355543095) | [OpsOh LLC](https://appshunter.io/developer/1877414741) |

## What reviewers say

### HVAC Decoder

[App page](https://appshunter.io/ios/app/hvac-decoder/id1355543096)

Decode HVAC model and serial numbers from major brands. This utility app provides thousands of model numbers and can email search results. It supports a wide range of HVAC equipment and offers close matches for unknown numbers.

**Highlights:** Decode HVAC model numbers, Decode HVAC serial numbers, Supports major HVAC brands, Thousands of model numbers, Email search results, Close match functionality, Report missing data

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

**In-app purchases:** none


### Date Stamp Photos

[App page](https://appshunter.io/ios/app/date-stamp-photos/id6758065631)

Easily add permanent date and time stamps to your photos. Customize the appearance and position of the stamp for clear documentation or sharing. Process single images or multiple photos in batches directly on your device.

**Highlights:** Add date and time directly to photos, Customizable stamp size, position, and style, Optional shadow for readability, Stamp single or multiple photos, Fast batch export, On-device processing

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Decoder free?

HVAC Decoder costs $9.99, with no in-app purchases.

### Is Date Stamp Photos free?

Date Stamp Photos costs $1.99, with no in-app purchases.

### Which has better reviews, HVAC Decoder or Date Stamp Photos?

HVAC Decoder is rated higher. HVAC Decoder averages 4.0 out of 5 from 28 ratings, while Date Stamp Photos averages 3.0 from 1 ratings.

### Do HVAC Decoder or Date Stamp Photos have ads?

Neither HVAC Decoder nor Date Stamp Photos shows ads.

### Which is updated more often, HVAC Decoder or Date Stamp Photos?

HVAC Decoder ships an update every 3 months, and Date Stamp Photos every 3 months. Most recently, HVAC Decoder was updated on October 7, 2026 and Date Stamp Photos on October 17, 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.*