> For AI agents: the complete documentation index is available at https://docs.flashnerd.com/llms.txt, the full documentation bundle is available at https://docs.flashnerd.com/llms-full.txt.

# Review settings

**Settings → Review Settings** contains two global controls that apply across your SRS sets. **Next Day Starts At** also affects activity statistics for Flashcard and Matching sessions.

## Change the global controls

Start from the **Settings** tab in your signed-in profile.

1. Open **Review Settings**.
2. Under **Review Ahead Limit**, choose a suggested number of minutes or enter a custom value.
3. Under **Next Day Starts At**, choose a suggested time or enter a custom time in `HH:mm` format.
4. When entering a custom value, leave the field or submit it from the keyboard to save it.

Suggested values save when selected. There is no separate Save button. Custom values outside the allowed range are limited to that range; invalid input returns to the previous value.

| Setting                | Default    | Allowed range              |
| ---------------------- | ---------- | -------------------------- |
| **Review Ahead Limit** | 20 minutes | 0–1,260 minutes (21 hours) |
| **Next Day Starts At** | 04:00      | 00:00–06:00                |

These controls are separate from a set's daily quotas, scheduling algorithm, and answer controls. Configure those in [SRS Set Settings](https://docs.flashnerd.com/guide/srs/settings-and-presets.md).

## Review cards due soon

**Review Ahead Limit** lets eligible SRS cards appear before their due time. Setting it to zero disables this early-review window; cards already due remain eligible under the other review rules.

The window is capped at the end of the current study day. Increasing it does not bring cards due at the next study-day reset into the current day. Daily limits and card availability still apply; see [Daily limits and review availability](https://docs.flashnerd.com/reference/srs/daily-limits.md).

## Choose when a study day starts

**Next Day Starts At** uses your device's local time. It determines the study day used for SRS daily limits and activity reporting across Flashcard, Matching, and SRS.

With the default 04:00 boundary, an answer at 01:00 counts toward the preceding study day. Previously recorded answers keep their saved study-day assignment when you change the boundary.

Mission check-ins and rewarded-ad quotas use **00:00 UTC** resets. Changing this local boundary does not move those resets or change how the check-in streak is calculated.

See [Study statistics](https://docs.flashnerd.com/guide/statistics/overview.md) for daily activity metrics and [Credits and missions](https://docs.flashnerd.com/guide/accounts/credits-and-missions.md) for UTC-based allowances.