WeightHeaviest single
140kg
Back Squat · 1 rep
Previous best135 kg
// PROGRESS //
Every set becomes a trend line.
Personal records, estimated 1RM and training volume, calculated from what you actually logged. Every analytics view is open from the first session, because there is no paid tier to unlock.
Back Squat, estimated 1RM12 weeks
131 kg, week 1147.5 kg, week 12
// THE SHORT ANSWER //
What does IronLedger track?
Personal records for weight, volume and estimated 1RM, per lift, plus your full session history. Records update automatically from logged sets, estimated 1RM uses the Epley formula, and history has no cutoff. Everything exports to CSV or Excel whenever you want it.
// RECORDS //
Three kinds of personal best.
VolumeBest session tonnage
7,250kg
Lower body · 24 sets
Previous best6,800 kg
Estimated 1RMHighest estimate
147.5kg
Back Squat · Epley
12-week change+4.2%
// THE MATH, IN THE OPEN //
We show you the formula.
Most apps ask you to trust the number. Here is the arithmetic, so you can check it.
// ESTIMATED 1RM //
estimated 1RM = weight × (1 + reps ÷ 30)
The Epley formula. A set of 100 kg × 5 gives 116.7 kg.
It is a trend signal, not a promise
An estimate tells you which direction your strength is moving. It does not promise what you would lift on a maximal attempt on a given day, and it should not be used to pick an opener.
Read volume alongside intensity
- Intensity. The same tonnage at 70% and at 90% are different weeks for your joints and your nervous system.
- Proximity to failure. RPE 6 sets and RPE 9.5 sets both add volume. Only one of them costs you the next session.
- Exercise selection. A squat kilogram and a leg-extension kilogram are not interchangeable, however neatly they sum.
- Recovery. Sleep, food and stress decide what a week of volume actually produces.
// TRENDS //
Lift by lift. Block by block.
Per-lift trend
Estimated 1RM and best set for a single lift, across every session you have logged.
Cycle comparison
Draw the current block against a previous one on the same axes. Current in cyan, comparison in pink.
Weekly recap
Sessions, tonnage and records for the week, so a block review takes a minute rather than an evening.
// SESSION REVIEW //
Read the session after the session.
Session summary
Every set as logged, with the target beside what you actually did.
Records broken
Any record the session set, with the previous value next to the new one.
Session notes
What you wrote at the time, kept with the numbers rather than in a separate app.
// DIRECT ANSWERS //
Questions about the numbers.
How is estimated 1RM calculated?
With the Epley formula: weight x (1 + reps / 30). It is printed on this page because you should be able to check it. A set of 100 kg x 5 gives an estimate of 116.7 kg.
Is an estimated 1RM the same as a real max?
No. It is a trend signal. It tells you which direction your strength is moving. It does not promise what you would lift on a maximal attempt on a given day.
What counts as a personal record?
Three things: weight, volume and estimated 1RM. Records are tracked per lift, and a session that breaks one says so with the previous value next to the new one.
How far back does history go?
All of it. There is no cutoff. Every session you have logged stays available, and the full record exports to CSV or Excel any time.
Are any charts behind a paywall?
No. Every analytics view is free. There is no paid tier in IronLedger, so there is nothing to unlock.
Can I see two blocks side by side?
Yes, with cycle comparison. The current block draws in cyan and the block you are comparing against draws in pink, on the same axes.
Log the work, read the result.
Free on the App Store with no in-app purchases. Android is in closed testing.