# ProgCalc vs iPTE

The clearest difference is price: ProgCalc at Free against iPTE's $1.99. ProgCalc also leads on update cadence (fortnightly vs every 9 months). iPTE's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

ProgCalc is free to download; iPTE costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ProgCalc ships an update fortnightly, iPTE every 9 months. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ProgCalc | iPTE |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 9 months |
| Monetization | — | Paid |
| Size | 12 MB | 98 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Neopoise](https://appshunter.io/developer/563901528) | [建锋 宋](https://appshunter.io/developer/1098794568) |

## What reviewers say

### ProgCalc

[App page](https://appshunter.io/ios/app/progcalc/id1441551265)

**Features:** macOS Compatibility

**In-app purchases:** none


### iPTE

[App page](https://appshunter.io/ios/app/ipte/id1502419058)

Explore the periodic table with extensive data on chemical elements and over 5500 isotopes. Features include element images, electron configurations, discovery history, and a solubility chart. Ideal for students, teachers, and science enthusiasts.

**Highlights:** Extensive element data, Over 5500 isotopes, Solubility chart, Element images and electron configurations, Discovery history, Search functionality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ProgCalc free?

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

### Is iPTE free?

iPTE costs $1.99, with no in-app purchases.

### Do ProgCalc or iPTE have ads?

Neither ProgCalc nor iPTE shows ads.

### Which is updated more often, ProgCalc or iPTE?

ProgCalc ships an update fortnightly, and iPTE every 9 months. Most recently, ProgCalc was updated on September 19, 2026 and iPTE on September 22, 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.*