AngularQM vs Jake for stratigraphy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AngularQM
This app helps quantum mechanics physicists quickly obtain matrix representations of angular momentum operators. It calculates matrices for J squared, the z component of J, and ladder operators for chosen total angular momentum values.
- Matrix representation of angular momentum operators
- Calculates J squared matrices
- Calculates Jz component matrices
- Calculates ladder operator matrices (J+, J-)
- Supports various total angular momentum values (j)
- Visualizes matrix representations
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AngularQM is an application for physicists working in quantum mechanics. It allows quickly obtain the matrix representation of the operators involved in the construction of angular momentum in quantum mechanics. Once the total angular momentum of the quantum system under consideration has been chosen (j = 1/2, j = 1, j = 2, etc.) it is possible to calculate the matrices associated with the operator J squared and the z component of operator J. It is also possible to calculate and visualize the matrix representations of the ladder operators: J + and J-.
Jake for stratigraphy
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Jake makes measuring a stratigraphic section a snap. Place the device on a bed, and with a tap of a button, record your dip and dip direction. Arrows tell you when your device is pointed in the direction of dip and inclined at the correct dip angle. No more futzing with hard-to-read clinometers and compasses!
Screenshots
Verdict
The clearest difference is price: Jake for stratigraphy at Free against AngularQM's $4.99. Jake for stratigraphy also leads on update cadence (every 22 months vs every 49 months). AngularQM's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Jake for stratigraphy is free to download; AngularQM costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AngularQM ships an update every 49 months, Jake for stratigraphy every 22 months. The most recent releases landed on July 4, 2026 and August 19, 2026 respectively.
| Parameter | AngularQM | Jake for stratigraphy |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 49 months | Every 22 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 26.4 | 26.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Gabriel Raffa | Hunt Mountain Software |
In-app purchases
AngularQM
No in-app purchases
Jake for stratigraphy
No in-app purchases
Questions
Is AngularQM free?
Is Jake for stratigraphy free?
Do AngularQM or Jake for stratigraphy have ads?
Which is updated more often, AngularQM or Jake for stratigraphy?
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