The interpretation timeline
Acts 8:18 Douay-Rheims

And when Simon saw, that by the imposition of the hands of the apostles, the Holy Ghost was given, he offered them money,

A.D. 220 – 1871 8 witnesses

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“There is the (infamous) Simon of Samaria in the Acts of the Apostles, who chaffered for the Holy Ghost: after his condemnation by Him, and a vain remorse that he and his money must perish together, he applied his energies to the destruction of the truth, as if to console himself with revenge.”
235
A.D.
Hippolytus of Rome Patristic
c. A.D. 170–235
“But that very sapient fellow Simon makes his statement thus, that there is an indefinite power, and that this is the root of the universe. And this indefinite power, he says, which is fire, is in itself not anything which is simple, as the gross bulk of speculators maintain, when they assert that there are four incomposite elements, and have supposed fire, as one of these, to be uncompounded. Simon, on the other hand, alleges that the nature of fire is twofold; and one portion of this twofold (nature) he calls a something secret, and another (a something) manifest. And he asserts that the secret is concealed in the manifest parts of the fire, and that the manifest parts of the fire have been produced from the secret. And he says that all the parts of the fire, visible and invisible, have been supposed to be in possession of a capacity of perception. The world, therefore, he says, that is begotten, has been produced from the unbegotten fire. And it commenced, he says, to exist thus: The Unbegotten One took six primal roots of the principle of generation from the principle of that fire. For he maintains that these roots have been generated in pairs from the fire; and these he denominates Mind and Intelligence, Voice and Name, Ratiocination and Reflection. And he asserts that in the six roots, at the same time, resides the indefinite power, which he affirms to be Him that stood, stands, and will stand. And when this one has been formed into a figure, He will, according to this heretic, exist in the six powers substantially and potentially. And He will be in magnitude and perfection one and the same with that unbegotten and indefinite power, possessing no attribute in any respect more deficient than that unbegotten, and unalterable, and indefinite power. If, however, He who stood, stands, and will stand, continues to exist only potentially in the six powers, and has not assumed any definite figure, He becomes, says Simon, utterly evanescent, and perishes. And this takes place in the same manner as the grammatical or geometrical capacity, which, though it has been implanted in man's soul, suffers extinction when it does not obtain (the assistance of) a master of either of these arts, who would indoctrinate that soul into its principles. Now Simon affirms that he himself is He who stood, stands, and will stand, and that He is a power that is above all things. So far, then, for the opinions of Simon likewise.”
Source
date
unknown
c. A.D. 400
“But Simon hearing this, and being smitten by his conscience, changed color and became bloodless; for he was afraid, if he denied it, that his house would be searched, or that Peter in his indignation would betray him more openly, and so all would learn what he was. Thus he answered: "I beseech you, Peter, by that good God who is in you, to overcome the wickedness that is in me. Receive me to repentance, and you shall have me as an assistant in your preaching. For now I have learned in very deed that you are a prophet of the true God, and therefore you alone know the secret and hidden things of men." Then said Peter: "You see, brethren, Simon seeking repentance; in a little while you shall see him returning again to his infidelity. For, thinking that I am a prophet, forasmuch as I have disclosed his wickedness, which he supposed to be secret and hidden, he has promised that he will repent. But it is not lawful for me to lie, nor must I deceive, whether this infidel be saved or not saved. For I call heaven and earth to witness, that I spoke not by a prophetic spirit what I said, and what I intimated, as far as was possible, to the listening crowds; but I learned from some who once were his associates in his works, but have now been converted to our faith, what things he did in secret. Therefore I spoke what I knew, not what I foreknew." But when Simon heard this, he assailed Peter with curses and reproaches, saying: "Oh most wicked and most deceitful of men, to whom fortune, not truth, hath given the victory. But I sought repentance not for defect of knowledge, but in order that you, thinking that by repentance I should become your disciple, might entrust to me all the secrets of your profession, and so at length, knowing them all, I might confute you. But as you cunningly understood for what reason I had pretended penitence, and acquiesced as if you did not understand my stratagem, that you might first expose me in presence of the people as unskilful, then foreseeing that being thus exposed to the people, I must of necessity be indignant, and confess that I was not truly penitent, you anticipated me, that you might say, that I should, after my penitence, again return to my infidelity, that you might seem to have conquered on all sides, both if I continued in the penitence which I had professed, and if I did not continue; and so you should be believed to be wise, because you had foreseen these things, while I should seem to be deceived, because I did not foresee your trick. But you foreseeing mine, have used subtlety and circumvented me. But, as I said, your victory is the result of fortune, not of truth: yet I know why I did not foresee this; because I stood by you and spoke with you in my goodness, and bore patiently with you. But now I shall show you the power of my divinity, so that you shall quickly fall down and worship me."”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"And when Simon saw that through laying on of the Apostles' hands the Holy Ghost was given, he offered them money, saying, Give me also this power, that on whomsoever I lay hands, he may receive the Holy Ghost." He would not have said, "And having seen," unless there had been some sensible manifestation. "Then laid they their hands on them," etc. Just as Paul also did, when they spake with tongues. Observe the execrable conduct of Simon. "He offered money," with what object? And yet he did not see Peter doing this for money. And it was not of ignorance that he acted thus; it was because he would tempt them, because he wished to get matter of accusation against them. It was a twofold sign: both the giving to those, and the not giving to this man. Whereas then this man ought, on the contrary, to have asked to receive the Holy Ghost, he, because he cared not for this, asks power to give It to others. And yet those received not this power to give: but this man wished to be more illustrious than Philip, he being among the disciples! "He offered them money." What? had he seen the others doing this? had he seen Philip? Did he imagine they did not know with what mind he came to them?”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Saying, give me also this power,.... He does not ask them to lay their hands on him, that he might receive the Holy Ghost, and have these gifts to exercise himself, but that he might have the power of conferring them on others: that on whomsoever I lay hands, he may receive the Holy Ghost; in which he discovered his ambition and avarice: his ambition, that he might be above Philip; who though he had these gifts, yet had not a power to lay on hands, and thereby convey them unto others; he perceived that this was purely apostolical; and indeed, what he requested was more than what the apostles could do; for though upon their prayers, and through the imposition of their hands, the gifts of the Spirit were bestowed upon men; yet they never could, nor did give a power to others, to do as they did; and his avarice prompted him to this, that he might make gain of it; not by doing miracles himself, but by conveying a power to others to do them.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“When Simon saw, etc. - By hearing these speak with different tongues and work miracles. He offered them money - Supposing that the dispensing this Spirit belonged to them - that they could give it to whomsoever they pleased; and imagining that, as he saw them to be poor men, they would not object to take money for their gift; and it is probable that he had gained considerably by his juggling, and therefore could afford to spare some, as he hoped to make it all up by the profit which he expected to derive from this new influence.”
Source
1849
A.D.
1774–1849
“Simon … offered them money. From hence it is called the sin of simony, to buy, sell, or give money for benefices, and spiritual things. It was vanity that made Simon desire this power. (Witham) — Hence to give or receive money in exchange, or as a price for any spiritual good whatever, is justly esteemed sinful. It is called simony, from the name of the person, who was first engaged in this sin. (Haydock) — Simon acts the part of a tempter to the apostles, and wishes to draw them into prevarication, by offering money for what was above all price, and of what they were not the proprietors, but the dispensers. (St. Clement of Rome)”
Source
1871
A.D.
1871
“offered them money--Hence the term simony, to denote trafficking in sacred things, but chiefly the purchase of ecclesiastical offices.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.