# 刻度Scale vs R90 Sleepytime

刻度Scale and R90 Sleepytime are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

刻度Scale costs $0.99 and R90 Sleepytime $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

刻度Scale ships an update weekly, R90 Sleepytime every 4 days. The most recent releases landed on October 13, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 刻度Scale | R90 Sleepytime |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | — | Free |
| Size | 3 MB | 72 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [浚羿 王](https://appshunter.io/developer/1854984027) | [志加 徐](https://appshunter.io/developer/1868269300) |

## What reviewers say

### 刻度Scale

[App page](https://appshunter.io/ios/app/scale/id6756906841)

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

**In-app purchases:** none


### R90 Sleepytime

[App page](https://appshunter.io/ios/app/r90-sleepytime/id6757743725)

This app calculates optimal sleep and wake times based on scientific sleep cycles. It also offers guided meditations and soothing sounds to help you relax and fall asleep faster.

**Highlights:** Sleep cycle calculation, Optimal wake time suggestions, Soothing sleep music, Guided meditation, Anxiety relief, Relaxation techniques

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

**In-app purchases:** none


## Frequently asked questions

### Is 刻度Scale free?

刻度Scale costs $0.99, with no in-app purchases.

### Is R90 Sleepytime free?

R90 Sleepytime costs $0.99, with no in-app purchases.

### Do 刻度Scale or R90 Sleepytime have ads?

Neither 刻度Scale nor R90 Sleepytime shows ads.

### Which is updated more often, 刻度Scale or R90 Sleepytime?

刻度Scale ships an update weekly, and R90 Sleepytime every 4 days. Most recently, 刻度Scale was updated on October 13, 2026 and R90 Sleepytime on October 28, 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.*