# DevHabit vs R90 Sleepytime

The clearest difference is price: DevHabit at Free against R90 Sleepytime's $0.99. R90 Sleepytime's advantage is in-app purchases (none vs 3) and update cadence (every 4 days vs every 4 months). On ads, device support and iOS requirement there is nothing between them.

DevHabit is free to download; R90 Sleepytime costs $0.99 up front. DevHabit sells 3 in-app purchases, starting at $2.99 per month. R90 Sleepytime asks for nothing beyond the download.

DevHabit ships an update every 4 months, R90 Sleepytime every 4 days. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | DevHabit | R90 Sleepytime |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 3 MB | 72 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [珍珍 张](https://appshunter.io/developer/1607946529) | [志加 徐](https://appshunter.io/developer/1868269300) |

## What reviewers say

### DevHabit

[App page](https://appshunter.io/ios/app/devhabit-habit-tracker/id6752989649)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly (Best Value) | $19.99 | per year |
| Pro Lifetime | $39.99 | one-time |


### 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 DevHabit free?

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

### Is R90 Sleepytime free?

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

### Do DevHabit or R90 Sleepytime have ads?

Neither DevHabit nor R90 Sleepytime shows ads.

### Which is updated more often, DevHabit or R90 Sleepytime?

DevHabit ships an update every 4 months, and R90 Sleepytime every 4 days. Most recently, DevHabit was updated on November 8, 2026 and R90 Sleepytime on November 9, 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.*