レシート
表示は無料、変更はPro
実行前の測定値、実行後の測定値、そしてすべての操作に1つの正直な判定。
The problem
After you fix something on your Mac, you are left to guess whether it helped, or whether the Mac would have settled on its own. Taking someone's word for it is not proof.
A receipt answers that for every action Hedroom takes. It compares readings from before with readings from after, and gives one of a few honest verdicts, including "No measurable effect." when the numbers did not move.
How it works
- Before. Hedroom takes the median of the 5 minutes of readings before the action. With less than 2 minutes of data, the receipt's confidence drops to low.
- Settle. It skips 30 seconds (60 after a relaunch) while the app reloads and things settle.
- After. It measures for 5 minutes and stops there if the readings are stable, or keeps going up to 15 minutes if they are not.
- Compare. A change counts only if it clears a floor: 100 MB of memory, 10 percentage points of one CPU core, 0.3 W, or 50 MB of disk. If the before readings were noisy, the change must also be larger than three times that noise.
- Say it honestly. The verdict is Measured, No effect, Not measurable (other apps changed too much at the same time) or Cancelled. Confidence is high, medium or low. A low one is labelled rough and left out of totals.
What you will see
The Receipts screen opens with a headline such as "21.3 GB of memory given back, every number measured on this Mac", with chips for fixes, rule actions, disk freed and rules not helping. Below is the list: each row names the action, shows Measured or No effect and a confidence label, and draws before and after bars. Open one for a chart of the measured value with the two windows shaded, the numbers, the confidence and anything that got in the way.
A cleanup receipt shows Put back while the files are still in the Trash. A rule with three no-effect receipts in a row gets a Turn rule off button. Export CSV writes one row per receipt with numbers only, no paths and no file names.
A worked example
Example, not real data
A rule that is not helping
Say you made a rule that pauses Spotify when it has been in the background for 10 minutes. It runs three times. Each receipt compares Spotify's CPU before and after: about 9% of a core both times. That is less than the 10 points Hedroom counts, so each one reads "No measurable effect."
After the third, Hedroom flags the rule: "Pausing Spotify saved nothing in 3 tries. Turn the rule off?" You decide; the rule never turns itself off. Had other apps moved by more than 1 GB in the same minutes, the receipts would have said Not measurable instead, and stayed out of your totals.
Details and limits
できること
- 操作前の約5分間の測定値と、操作後の5〜15分間の測定値を比較します。
- 数値が動いたときは「測定済み」、動かなかったときは「測定できる効果はありません。」、他のアプリの変化が大きくて判断できないときは「測定不可」と表示します。
- 整理では、ゴミ箱に移したものを報告します。ディスク容量が確保されたと数えるのは、ゴミ箱を空にしたあとだけです。
What it will not do
- 測定できない変化を成果として扱うこと。
- ファイルがまだゴミ箱にあるのに、ディスク容量を確保したと主張すること。
Limits
- レシートは2つの時間帯を比較するものです。対照実験ではありません。
- 実際に小さな変化があっても、「測定できる効果はありません」と表示されることがあります。Hedroomは、示せない成果を主張するより、小さな成果を見逃すほうを選びます。
無料かProか
過去のレシートは、無料でも引き続き読めます。新しいレシートは操作に付くため、Proで作成されます。
The line is simple: looking at your Mac is free, and acting on it, with the measurement of what the action did, is Pro.
Questions people ask
Is a receipt scientific proof?
No, and it says so. It compares two time windows on your Mac. It is not a controlled trial. Something else you do during a window can show up in the numbers, which is what the Not measurable verdict is for.
Why would I see "No measurable effect" often?
Hedroom prefers to miss a small win than to claim one it cannot show, so a real change smaller than the floors above reads as no effect. It costs you nothing: no credit taken and no total inflated. How to read a receipt explains each part.
Are receipts stored or sent anywhere?
They are stored on your Mac. Receipt rows hold numbers and counts, never file paths. Nothing is uploaded.
Does a disk cleanup count as freed space straight away?
No. Moving files to the Trash frees nothing until the Trash is emptied. The cleanup receipt reports what went to the Trash, and claims free space only when it measurably grew.