# TPASS.calc vs After Buying

The clearest difference is in-app purchases: TPASS.calc at none against After Buying's 1. TPASS.calc also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. After Buying sells 1 one-off in-app purchase. TPASS.calc asks for nothing beyond the download.

TPASS.calc ships an update every 2 days, After Buying every 3 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | TPASS.calc | After Buying |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Size | 84 MB | 18 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CHENG RUEI HSU](https://appshunter.io/developer/1871371578) | [WEI-ZHONG ZHANG](https://appshunter.io/developer/6801011255) |

## What reviewers say

### TPASS.calc

[App page](https://appshunter.io/ios/app/tpasscalc/id6758194196)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### After Buying

[App page](https://appshunter.io/ios/app/after-buying/id6801011253)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久解鎖完整版 | $8.99 | one-time |


## Frequently asked questions

### Is TPASS.calc free?

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

### Is After Buying free?

After Buying is free to download, with in-app purchases available.

### Do TPASS.calc or After Buying have ads?

Neither TPASS.calc nor After Buying shows ads.

### Which is updated more often, TPASS.calc or After Buying?

TPASS.calc ships an update every 2 days, and After Buying every 3 days. Most recently, TPASS.calc was updated on October 28, 2026 and After Buying on October 31, 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.*