# 加一 vs SubKiller

The clearest difference is iOS requirement: 加一 at 17.6 against SubKiller's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 加一 sells 4 one-off in-app purchases and SubKiller sells 3 in-app purchases, starting at $6.99 per year. Whichever you choose, the download price is not the number that matters.

加一 ships an update weekly, SubKiller every 2 weeks. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 加一 | SubKiller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6743779457/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 21 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [世棚 余](https://appshunter.io/developer/1803830896) | [迅 王](https://appshunter.io/developer/1873842519) |

## What reviewers say

### 加一

[App page](https://appshunter.io/ios/app/id6743779457)

This app offers a new way to manage your thoughts and decisions. It allows you to record every +1 or -1 with detailed notes, moods, and images, making your decision-making process clear. Visualize your thinking trends with charts and sync across devices.

**Highlights:** +1/-1 recording, Add notes, moods, and images, Visualize thinking trends with charts, iCloud sync, Shortcut support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小杯咖啡 | $0.99 | one-time |
| 大杯咖啡 | $2.99 | one-time |
| OneOne永久会员 | $14.99 | one-time |
| 豪华大餐 | $19.99 | one-time |


### SubKiller

[App page](https://appshunter.io/ios/app/subkiller/id6761400615)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Yearly | $6.99 | per year |
| SubKiller Pro | $4.99 | one-time |
| Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is 加一 free?

加一 is free to download, with in-app purchases available.

### Is SubKiller free?

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

### Do 加一 or SubKiller have ads?

Neither 加一 nor SubKiller shows ads.

### Which is updated more often, 加一 or SubKiller?

加一 ships an update weekly, and SubKiller every 2 weeks. Most recently, 加一 was updated on October 14, 2026 and SubKiller on October 16, 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.*