# BuyTracker vs SubSum

The clearest difference is in-app purchases: SubSum at none against BuyTracker's 1. BuyTracker's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BuyTracker sells 1 one-off in-app purchase. SubSum asks for nothing beyond the download.

BuyTracker ships an update every 3 weeks, SubSum every 4 months. The most recent releases landed on October 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | BuyTracker | SubSum |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 2 MB |
| Requires iOS | 17 | 17 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [辉 彭](https://appshunter.io/developer/1780252118) | [桥 汪](https://appshunter.io/developer/1658027527) |

## What reviewers say

### BuyTracker

[App page](https://appshunter.io/ios/app/buytracker-digital-inventory/id6739853131)

Easily track your belongings with photos, purchase details, and status updates. Analyze your possessions over time to understand ownership duration and cost per day. Organize everything from electronics to collections for a clear personal archive.

**Highlights:** Visual item records with photos, Purchase price, date, and store tracking, Categories and multiple tags, Item status tracking, Days owned and cost per day calculation, Detailed item statistics, PDF and image export

**Features:** Family Sharing, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁物品数量 | $19.99 | one-time |


### SubSum

[App page](https://appshunter.io/ios/app/subsum/id6754885566)

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

**In-app purchases:** none


## Frequently asked questions

### Is BuyTracker free?

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

### Is SubSum free?

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

### Do BuyTracker or SubSum have ads?

Neither BuyTracker nor SubSum shows ads.

### Which is updated more often, BuyTracker or SubSum?

BuyTracker ships an update every 3 weeks, and SubSum every 4 months. Most recently, BuyTracker was updated on October 30, 2026 and SubSum on October 12, 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.*